./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.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 2bd207b6d8c3cba6214f1ba8adce7e591602c1888ec1534f1ed7e234fe68ec12 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:16:22,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:16:22,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:16:22,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:16:22,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:16:22,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:16:22,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:16:22,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:16:22,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:16:22,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:16:22,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:16:22,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:16:22,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:16:22,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:16:22,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:16:22,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:16:22,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:16:22,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:16:22,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:16:22,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:16:22,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:16:22,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:16:22,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:16:22,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:16:22,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:16:22,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:16:22,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:16:22,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:16:22,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:16:22,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:16:22,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:16:22,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:16:22,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:16:22,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:16:22,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:16:22,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:16:22,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:16:22,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:16:22,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:16:22,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:16:22,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:16:22,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:16:23,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:16:23,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:16:23,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:16:23,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:16:23,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:16:23,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:16:23,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:16:23,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:16:23,017 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:16:23,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:16:23,018 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:16:23,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:16:23,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:16:23,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:16:23,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:16:23,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:16:23,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:16:23,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:16:23,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:16:23,020 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:16:23,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:16:23,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:16:23,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:16:23,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:16:23,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:16:23,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:16:23,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:16:23,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:16:23,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:16:23,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:16:23,022 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:16:23,022 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:16:23,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:16:23,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:16:23,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2bd207b6d8c3cba6214f1ba8adce7e591602c1888ec1534f1ed7e234fe68ec12 [2021-12-16 02:16:23,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:16:23,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:16:23,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:16:23,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:16:23,273 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:16:23,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c [2021-12-16 02:16:23,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4826c06f4/ebf18bca8abb475381628654ea0a78de/FLAG81e242885 [2021-12-16 02:16:23,894 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:16:23,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c [2021-12-16 02:16:23,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4826c06f4/ebf18bca8abb475381628654ea0a78de/FLAG81e242885 [2021-12-16 02:16:24,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4826c06f4/ebf18bca8abb475381628654ea0a78de [2021-12-16 02:16:24,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:16:24,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:16:24,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:16:24,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:16:24,095 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:16:24,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:16:24" (1/1) ... [2021-12-16 02:16:24,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73807961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:24, skipping insertion in model container [2021-12-16 02:16:24,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:16:24" (1/1) ... [2021-12-16 02:16:24,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:16:24,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:16:24,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c[8653,8666] [2021-12-16 02:16:24,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c[15943,15956] [2021-12-16 02:16:25,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:16:25,083 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:16:25,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c[8653,8666] [2021-12-16 02:16:25,125 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c[15943,15956] [2021-12-16 02:16:25,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:16:25,480 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:16:25,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25 WrapperNode [2021-12-16 02:16:25,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:16:25,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:16:25,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:16:25,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:16:25,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:25,579 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:25,901 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5032 [2021-12-16 02:16:25,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:16:25,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:16:25,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:16:25,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:16:25,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:25,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:16:26,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:16:26,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:16:26,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:16:26,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (1/1) ... [2021-12-16 02:16:26,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:16:26,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:26,469 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) [2021-12-16 02:16:26,487 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 [2021-12-16 02:16:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:16:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:16:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:16:26,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:16:26,593 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:16:26,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:16:29,563 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:16:29,583 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:16:29,583 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:16:29,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:16:29 BoogieIcfgContainer [2021-12-16 02:16:29,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:16:29,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:16:29,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:16:29,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:16:29,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:16:24" (1/3) ... [2021-12-16 02:16:29,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2937f8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:16:29, skipping insertion in model container [2021-12-16 02:16:29,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:16:25" (2/3) ... [2021-12-16 02:16:29,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2937f8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:16:29, skipping insertion in model container [2021-12-16 02:16:29,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:16:29" (3/3) ... [2021-12-16 02:16:29,593 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label02.c [2021-12-16 02:16:29,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:16:29,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:16:29,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:16:29,653 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 [2021-12-16 02:16:29,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:16:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 02:16:29,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:29,693 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] [2021-12-16 02:16:29,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2021-12-16 02:16:29,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:29,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915096706] [2021-12-16 02:16:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:29,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:29,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915096706] [2021-12-16 02:16:29,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915096706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:29,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:29,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:16:29,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449242531] [2021-12-16 02:16:29,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:29,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 02:16:29,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 02:16:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 02:16:29,843 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 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 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:29,888 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2021-12-16 02:16:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 02:16:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-16 02:16:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:29,905 INFO L225 Difference]: With dead ends: 1757 [2021-12-16 02:16:29,905 INFO L226 Difference]: Without dead ends: 827 [2021-12-16 02:16:29,911 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 [2021-12-16 02:16:29,914 INFO L933 BasicCegarLoop]: 1627 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, 1627 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 [2021-12-16 02:16:29,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-16 02:16:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-16 02:16:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2021-12-16 02:16:29,976 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2021-12-16 02:16:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:29,977 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2021-12-16 02:16:29,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2021-12-16 02:16:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 02:16:29,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:29,978 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] [2021-12-16 02:16:29,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:16:29,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-16 02:16:29,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:29,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155280675] [2021-12-16 02:16:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:29,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:30,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:30,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155280675] [2021-12-16 02:16:30,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155280675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:30,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:30,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:30,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988190574] [2021-12-16 02:16:30,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:30,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:16:30,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:16:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:16:30,035 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,118 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2021-12-16 02:16:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-16 02:16:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,124 INFO L225 Difference]: With dead ends: 919 [2021-12-16 02:16:30,124 INFO L226 Difference]: Without dead ends: 871 [2021-12-16 02:16:30,129 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 [2021-12-16 02:16:30,131 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:30,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-16 02:16:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2021-12-16 02:16:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2021-12-16 02:16:30,152 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2021-12-16 02:16:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:30,152 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2021-12-16 02:16:30,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,153 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2021-12-16 02:16:30,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 02:16:30,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:30,154 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] [2021-12-16 02:16:30,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:16:30,154 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-16 02:16:30,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:30,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771713204] [2021-12-16 02:16:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:30,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:30,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771713204] [2021-12-16 02:16:30,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771713204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:30,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:30,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:30,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938798767] [2021-12-16 02:16:30,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:30,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:30,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:30,218 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,238 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2021-12-16 02:16:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:30,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 02:16:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,242 INFO L225 Difference]: With dead ends: 909 [2021-12-16 02:16:30,242 INFO L226 Difference]: Without dead ends: 865 [2021-12-16 02:16:30,243 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 [2021-12-16 02:16:30,244 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 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 [2021-12-16 02:16:30,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-16 02:16:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-12-16 02:16:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 861 states have (on average 1.8513356562137049) internal successors, (1594), 862 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2021-12-16 02:16:30,261 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2021-12-16 02:16:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:30,261 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2021-12-16 02:16:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2021-12-16 02:16:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 02:16:30,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:30,263 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] [2021-12-16 02:16:30,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:16:30,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-16 02:16:30,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447155822] [2021-12-16 02:16:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:30,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:30,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:30,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447155822] [2021-12-16 02:16:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447155822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:30,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:30,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:30,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102547198] [2021-12-16 02:16:30,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:30,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:30,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:30,312 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,334 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2021-12-16 02:16:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 02:16:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,339 INFO L225 Difference]: With dead ends: 1011 [2021-12-16 02:16:30,339 INFO L226 Difference]: Without dead ends: 931 [2021-12-16 02:16:30,339 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 [2021-12-16 02:16:30,340 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 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 [2021-12-16 02:16:30,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-16 02:16:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2021-12-16 02:16:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 927 states have (on average 1.8306364617044228) internal successors, (1697), 928 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2021-12-16 02:16:30,359 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2021-12-16 02:16:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:30,360 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2021-12-16 02:16:30,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2021-12-16 02:16:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 02:16:30,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:30,362 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] [2021-12-16 02:16:30,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:16:30,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:30,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-16 02:16:30,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435794852] [2021-12-16 02:16:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:30,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:30,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435794852] [2021-12-16 02:16:30,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435794852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:30,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:30,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:30,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083281380] [2021-12-16 02:16:30,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:30,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:30,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:30,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:30,473 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,496 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2021-12-16 02:16:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:30,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 02:16:30,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,500 INFO L225 Difference]: With dead ends: 1197 [2021-12-16 02:16:30,500 INFO L226 Difference]: Without dead ends: 1051 [2021-12-16 02:16:30,501 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 [2021-12-16 02:16:30,502 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 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 [2021-12-16 02:16:30,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-12-16 02:16:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2021-12-16 02:16:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1047 states have (on average 1.7965616045845272) internal successors, (1881), 1048 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2021-12-16 02:16:30,525 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2021-12-16 02:16:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:30,526 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2021-12-16 02:16:30,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2021-12-16 02:16:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 02:16:30,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:30,527 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] [2021-12-16 02:16:30,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:16:30,528 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-16 02:16:30,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:30,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266712324] [2021-12-16 02:16:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:30,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:30,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:30,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266712324] [2021-12-16 02:16:30,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266712324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:30,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:30,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:30,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167507516] [2021-12-16 02:16:30,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:30,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:30,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:30,574 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,609 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2021-12-16 02:16:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 02:16:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,616 INFO L225 Difference]: With dead ends: 1533 [2021-12-16 02:16:30,616 INFO L226 Difference]: Without dead ends: 1267 [2021-12-16 02:16:30,617 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 [2021-12-16 02:16:30,622 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 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 [2021-12-16 02:16:30,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-12-16 02:16:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-12-16 02:16:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1263 states have (on average 1.7458432304038005) internal successors, (2205), 1264 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2021-12-16 02:16:30,663 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2021-12-16 02:16:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:30,665 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2021-12-16 02:16:30,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2021-12-16 02:16:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 02:16:30,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:30,666 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] [2021-12-16 02:16:30,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:16:30,666 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:30,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:30,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-16 02:16:30,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:30,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936454792] [2021-12-16 02:16:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:30,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:30,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936454792] [2021-12-16 02:16:30,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936454792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:30,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:30,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:16:30,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433457384] [2021-12-16 02:16:30,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:30,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:30,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:30,752 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:30,930 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2021-12-16 02:16:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:16:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 02:16:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:30,947 INFO L225 Difference]: With dead ends: 5121 [2021-12-16 02:16:30,947 INFO L226 Difference]: Without dead ends: 4639 [2021-12-16 02:16:30,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:16:30,951 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:30,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:16:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-12-16 02:16:31,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2021-12-16 02:16:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1743 states have (on average 1.6689615605278256) internal successors, (2909), 1744 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2021-12-16 02:16:31,028 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2021-12-16 02:16:31,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:31,028 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2021-12-16 02:16:31,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2021-12-16 02:16:31,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 02:16:31,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:31,030 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] [2021-12-16 02:16:31,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 02:16:31,030 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-16 02:16:31,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561039343] [2021-12-16 02:16:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:31,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:31,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:31,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561039343] [2021-12-16 02:16:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561039343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:31,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:31,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:16:31,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297770090] [2021-12-16 02:16:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:31,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:31,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:31,061 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:31,111 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2021-12-16 02:16:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:31,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-16 02:16:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:31,118 INFO L225 Difference]: With dead ends: 3151 [2021-12-16 02:16:31,118 INFO L226 Difference]: Without dead ends: 2189 [2021-12-16 02:16:31,120 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 [2021-12-16 02:16:31,120 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:31,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-16 02:16:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-16 02:16:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6215102974828375) internal successors, (3543), 2186 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2021-12-16 02:16:31,183 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2021-12-16 02:16:31,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:31,183 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2021-12-16 02:16:31,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2021-12-16 02:16:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 02:16:31,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:31,185 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] [2021-12-16 02:16:31,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 02:16:31,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-16 02:16:31,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:31,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199122125] [2021-12-16 02:16:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:31,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:31,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:31,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199122125] [2021-12-16 02:16:31,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199122125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:31,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:31,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:16:31,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378621347] [2021-12-16 02:16:31,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:31,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:31,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:31,317 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:31,434 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2021-12-16 02:16:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-16 02:16:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:31,441 INFO L225 Difference]: With dead ends: 3591 [2021-12-16 02:16:31,441 INFO L226 Difference]: Without dead ends: 2189 [2021-12-16 02:16:31,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:16:31,443 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6036 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:31,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6036 Valid, 1726 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-16 02:16:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-16 02:16:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6105263157894736) internal successors, (3519), 2186 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2021-12-16 02:16:31,496 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2021-12-16 02:16:31,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:31,497 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2021-12-16 02:16:31,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2021-12-16 02:16:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 02:16:31,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:31,498 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] [2021-12-16 02:16:31,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 02:16:31,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:31,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-16 02:16:31,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:31,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479506234] [2021-12-16 02:16:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:31,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:31,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479506234] [2021-12-16 02:16:31,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479506234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:31,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:31,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:31,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598266042] [2021-12-16 02:16:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:31,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:31,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:31,542 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:31,648 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2021-12-16 02:16:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 02:16:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:31,655 INFO L225 Difference]: With dead ends: 3589 [2021-12-16 02:16:31,656 INFO L226 Difference]: Without dead ends: 2187 [2021-12-16 02:16:31,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:31,658 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4595 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:31,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4595 Valid, 2977 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-16 02:16:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-16 02:16:31,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.59954233409611) internal successors, (3495), 2186 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2021-12-16 02:16:31,724 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2021-12-16 02:16:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:31,724 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2021-12-16 02:16:31,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2021-12-16 02:16:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 02:16:31,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:31,725 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] [2021-12-16 02:16:31,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 02:16:31,726 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-16 02:16:31,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:31,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034299383] [2021-12-16 02:16:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:31,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:31,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:31,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034299383] [2021-12-16 02:16:31,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034299383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:31,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:31,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:16:31,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619944255] [2021-12-16 02:16:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:31,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:31,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:31,766 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:31,877 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2021-12-16 02:16:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 02:16:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:31,884 INFO L225 Difference]: With dead ends: 3589 [2021-12-16 02:16:31,884 INFO L226 Difference]: Without dead ends: 2187 [2021-12-16 02:16:31,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:31,886 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:31,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-16 02:16:31,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-16 02:16:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.588558352402746) internal successors, (3471), 2186 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2021-12-16 02:16:31,952 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2021-12-16 02:16:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:31,953 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2021-12-16 02:16:31,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2021-12-16 02:16:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 02:16:31,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:31,996 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] [2021-12-16 02:16:31,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:16:31,996 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-16 02:16:31,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:31,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291383548] [2021-12-16 02:16:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:31,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:32,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291383548] [2021-12-16 02:16:32,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291383548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:32,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:32,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:16:32,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569747608] [2021-12-16 02:16:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:32,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:16:32,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:32,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:16:32,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:16:32,057 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:32,262 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2021-12-16 02:16:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:16:32,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 02:16:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:32,273 INFO L225 Difference]: With dead ends: 3418 [2021-12-16 02:16:32,273 INFO L226 Difference]: Without dead ends: 3416 [2021-12-16 02:16:32,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-16 02:16:32,275 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 402 mSDsluCounter, 9061 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 10613 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:32,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 10613 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-12-16 02:16:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2021-12-16 02:16:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5602805786935554) internal successors, (3559), 2282 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2021-12-16 02:16:32,369 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2021-12-16 02:16:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:32,369 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2021-12-16 02:16:32,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2021-12-16 02:16:32,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 02:16:32,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:32,370 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] [2021-12-16 02:16:32,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:16:32,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash -748597284, now seen corresponding path program 1 times [2021-12-16 02:16:32,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:32,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864458631] [2021-12-16 02:16:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:32,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:32,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:32,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864458631] [2021-12-16 02:16:32,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864458631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:32,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:32,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:16:32,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854780501] [2021-12-16 02:16:32,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:32,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:16:32,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:32,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:16:32,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:32,397 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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) [2021-12-16 02:16:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:35,294 INFO L93 Difference]: Finished difference Result 3787 states and 6432 transitions. [2021-12-16 02:16:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:16:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 [2021-12-16 02:16:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:35,304 INFO L225 Difference]: With dead ends: 3787 [2021-12-16 02:16:35,304 INFO L226 Difference]: Without dead ends: 3034 [2021-12-16 02:16:35,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:16:35,309 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 834 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:35,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 571 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-16 02:16:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-12-16 02:16:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 3034. [2021-12-16 02:16:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.4967018469656992) internal successors, (4538), 3033 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4538 transitions. [2021-12-16 02:16:35,400 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4538 transitions. Word has length 63 [2021-12-16 02:16:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:35,400 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4538 transitions. [2021-12-16 02:16:35,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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) [2021-12-16 02:16:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4538 transitions. [2021-12-16 02:16:35,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 02:16:35,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:35,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:35,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:16:35,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:35,405 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-16 02:16:35,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:35,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178111430] [2021-12-16 02:16:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:35,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 02:16:35,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:35,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178111430] [2021-12-16 02:16:35,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178111430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:35,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:35,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:16:35,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771136718] [2021-12-16 02:16:35,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:35,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:35,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:35,463 INFO L87 Difference]: Start difference. First operand 3034 states and 4538 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:35,727 INFO L93 Difference]: Finished difference Result 9340 states and 13307 transitions. [2021-12-16 02:16:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 02:16:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:35,757 INFO L225 Difference]: With dead ends: 9340 [2021-12-16 02:16:35,758 INFO L226 Difference]: Without dead ends: 7842 [2021-12-16 02:16:35,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:35,763 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4749 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4749 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:35,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4749 Valid, 3340 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2021-12-16 02:16:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2021-12-16 02:16:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4580388692579505) internal successors, (6602), 4529 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6602 transitions. [2021-12-16 02:16:36,025 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6602 transitions. Word has length 79 [2021-12-16 02:16:36,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:36,025 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6602 transitions. [2021-12-16 02:16:36,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6602 transitions. [2021-12-16 02:16:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 02:16:36,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:36,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:36,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:16:36,029 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-16 02:16:36,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:36,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513582802] [2021-12-16 02:16:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:36,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 02:16:36,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513582802] [2021-12-16 02:16:36,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513582802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:36,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:36,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:16:36,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417140017] [2021-12-16 02:16:36,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:36,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:36,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:36,087 INFO L87 Difference]: Start difference. First operand 4530 states and 6602 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:36,427 INFO L93 Difference]: Finished difference Result 10836 states and 15371 transitions. [2021-12-16 02:16:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 02:16:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:36,447 INFO L225 Difference]: With dead ends: 10836 [2021-12-16 02:16:36,447 INFO L226 Difference]: Without dead ends: 9338 [2021-12-16 02:16:36,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:36,454 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4706 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:36,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4706 Valid, 3379 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:36,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-12-16 02:16:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2021-12-16 02:16:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.42827626918536) internal successors, (9678), 6777 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9678 transitions. [2021-12-16 02:16:36,735 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9678 transitions. Word has length 79 [2021-12-16 02:16:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:36,735 INFO L470 AbstractCegarLoop]: Abstraction has 6778 states and 9678 transitions. [2021-12-16 02:16:36,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9678 transitions. [2021-12-16 02:16:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 02:16:36,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:36,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:36,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 02:16:36,738 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-16 02:16:36,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:36,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322615534] [2021-12-16 02:16:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:36,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:16:36,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322615534] [2021-12-16 02:16:36,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322615534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:36,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:36,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:16:36,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286525350] [2021-12-16 02:16:36,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:36,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:36,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:36,792 INFO L87 Difference]: Start difference. First operand 6778 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:37,222 INFO L93 Difference]: Finished difference Result 12332 states and 17435 transitions. [2021-12-16 02:16:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:37,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 02:16:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:37,240 INFO L225 Difference]: With dead ends: 12332 [2021-12-16 02:16:37,240 INFO L226 Difference]: Without dead ends: 10834 [2021-12-16 02:16:37,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:37,246 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4738 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:37,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3395 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-12-16 02:16:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2021-12-16 02:16:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4194874274661509) internal successors, (11742), 8273 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11742 transitions. [2021-12-16 02:16:37,578 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11742 transitions. Word has length 79 [2021-12-16 02:16:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:37,578 INFO L470 AbstractCegarLoop]: Abstraction has 8274 states and 11742 transitions. [2021-12-16 02:16:37,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11742 transitions. [2021-12-16 02:16:37,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-16 02:16:37,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:37,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:37,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:16:37,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-16 02:16:37,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:37,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894583183] [2021-12-16 02:16:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:37,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:16:37,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:37,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894583183] [2021-12-16 02:16:37,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894583183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:16:37,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:16:37,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:16:37,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513970282] [2021-12-16 02:16:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:16:37,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:16:37,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:16:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:16:37,632 INFO L87 Difference]: Start difference. First operand 8274 states and 11742 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:38,212 INFO L93 Difference]: Finished difference Result 12948 states and 18299 transitions. [2021-12-16 02:16:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:16:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-16 02:16:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:38,236 INFO L225 Difference]: With dead ends: 12948 [2021-12-16 02:16:38,236 INFO L226 Difference]: Without dead ends: 11890 [2021-12-16 02:16:38,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:16:38,243 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4737 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:38,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 3346 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:16:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2021-12-16 02:16:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2021-12-16 02:16:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4165951972555746) internal successors, (13214), 9329 states have internal predecessors, (13214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13214 transitions. [2021-12-16 02:16:38,763 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13214 transitions. Word has length 79 [2021-12-16 02:16:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:38,764 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 13214 transitions. [2021-12-16 02:16:38,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13214 transitions. [2021-12-16 02:16:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-16 02:16:38,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:38,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:38,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:16:38,768 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-16 02:16:38,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064094714] [2021-12-16 02:16:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:38,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:38,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064094714] [2021-12-16 02:16:38,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064094714] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955810827] [2021-12-16 02:16:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:38,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:38,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:16:38,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:16:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 02:16:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:39,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:39,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955810827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:39,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:39,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 19 [2021-12-16 02:16:39,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001445120] [2021-12-16 02:16:39,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:39,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 02:16:39,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 02:16:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:16:39,830 INFO L87 Difference]: Start difference. First operand 9330 states and 13214 transitions. Second operand has 19 states, 19 states have (on average 11.947368421052632) internal successors, (227), 19 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:16:46,567 INFO L93 Difference]: Finished difference Result 85630 states and 117760 transitions. [2021-12-16 02:16:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-16 02:16:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.947368421052632) internal successors, (227), 19 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-16 02:16:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:16:46,733 INFO L225 Difference]: With dead ends: 85630 [2021-12-16 02:16:46,733 INFO L226 Difference]: Without dead ends: 78944 [2021-12-16 02:16:46,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 148 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7184 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2579, Invalid=14977, Unknown=0, NotChecked=0, Total=17556 [2021-12-16 02:16:46,763 INFO L933 BasicCegarLoop]: 1623 mSDtfsCounter, 18711 mSDsluCounter, 10019 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18711 SdHoareTripleChecker+Valid, 11642 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:16:46,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18711 Valid, 11642 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 02:16:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78944 states. [2021-12-16 02:16:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78944 to 61442. [2021-12-16 02:16:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61442 states, 61440 states have (on average 1.3654622395833333) internal successors, (83894), 61441 states have internal predecessors, (83894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61442 states to 61442 states and 83894 transitions. [2021-12-16 02:16:50,293 INFO L78 Accepts]: Start accepts. Automaton has 61442 states and 83894 transitions. Word has length 80 [2021-12-16 02:16:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:16:50,294 INFO L470 AbstractCegarLoop]: Abstraction has 61442 states and 83894 transitions. [2021-12-16 02:16:50,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.947368421052632) internal successors, (227), 19 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:16:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 61442 states and 83894 transitions. [2021-12-16 02:16:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-16 02:16:50,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:16:50,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:16:50,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:16:50,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 02:16:50,500 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:16:50,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:16:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1078716562, now seen corresponding path program 1 times [2021-12-16 02:16:50,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:16:50,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831844149] [2021-12-16 02:16:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:50,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:16:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:50,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:16:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831844149] [2021-12-16 02:16:50,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831844149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:16:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9311035] [2021-12-16 02:16:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:16:50,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:16:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:16:50,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:16:50,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:16:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:16:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 02:16:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:16:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:51,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:16:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:16:52,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9311035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:16:52,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:16:52,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-16 02:16:52,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453692243] [2021-12-16 02:16:52,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:16:52,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 02:16:52,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:16:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 02:16:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-12-16 02:16:52,188 INFO L87 Difference]: Start difference. First operand 61442 states and 83894 transitions. Second operand has 30 states, 30 states have (on average 7.1) internal successors, (213), 29 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)