./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF --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 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:18:48,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:18:48,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:18:48,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:18:48,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:18:48,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:18:48,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:18:48,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:18:48,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:18:48,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:18:48,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:18:48,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:18:48,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:18:48,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:18:48,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:18:48,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:18:48,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:18:48,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:18:48,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:18:48,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:18:48,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:18:48,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:18:48,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:18:48,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:18:48,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:18:48,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:18:48,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:18:48,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:18:48,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:18:48,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:18:48,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:18:48,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:18:48,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:18:48,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:18:48,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:18:48,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:18:48,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:18:48,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:18:48,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:18:48,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:18:48,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:18:48,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:18:48,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:18:48,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:18:48,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:18:48,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:18:49,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:18:49,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:18:49,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:18:49,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:18:49,008 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:18:49,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:18:49,009 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:18:49,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:18:49,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:18:49,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:18:49,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:18:49,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:18:49,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:18:49,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:18:49,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:18:49,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:18:49,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:18:49,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:18:49,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:18:49,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:18:49,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:18:49,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:18:49,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:18:49,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:18:49,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:18:49,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:18:49,016 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:18:49,016 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:18:49,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:18:49,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:18:49,017 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb [2021-11-20 06:18:49,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:18:49,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:18:49,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:18:49,305 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:18:49,305 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:18:49,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c [2021-11-20 06:18:49,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/data/1df805de2/bdc4dad35ad64ebe871bfc9913de302f/FLAG70070c92f [2021-11-20 06:18:49,861 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:18:49,861 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c [2021-11-20 06:18:49,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/data/1df805de2/bdc4dad35ad64ebe871bfc9913de302f/FLAG70070c92f [2021-11-20 06:18:50,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/data/1df805de2/bdc4dad35ad64ebe871bfc9913de302f [2021-11-20 06:18:50,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:18:50,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:18:50,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:18:50,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:18:50,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:18:50,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@203d64a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50, skipping insertion in model container [2021-11-20 06:18:50,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:18:50,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:18:50,497 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924] [2021-11-20 06:18:50,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429] [2021-11-20 06:18:50,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:18:50,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:18:50,683 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924] [2021-11-20 06:18:50,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429] [2021-11-20 06:18:50,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:18:50,792 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:18:50,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50 WrapperNode [2021-11-20 06:18:50,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:18:50,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:18:50,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:18:50,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:18:50,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,870 INFO L137 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 846 [2021-11-20 06:18:50,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:18:50,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:18:50,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:18:50,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:18:50,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:18:50,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:18:50,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:18:50,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:18:50,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (1/1) ... [2021-11-20 06:18:50,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:18:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:18:51,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:18:51,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e67bb-507d-4347-9e5f-8adf973b26eb/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:18:51,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:18:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 06:18:51,046 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 06:18:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-20 06:18:51,046 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-20 06:18:51,046 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-20 06:18:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-20 06:18:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-20 06:18:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-20 06:18:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-20 06:18:51,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-20 06:18:51,047 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-20 06:18:51,048 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-20 06:18:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-20 06:18:51,048 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-20 06:18:51,048 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-20 06:18:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-20 06:18:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-20 06:18:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-20 06:18:51,049 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-20 06:18:51,049 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-20 06:18:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-20 06:18:51,050 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-20 06:18:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:18:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-20 06:18:51,050 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-20 06:18:51,050 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-20 06:18:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-20 06:18:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:18:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:18:51,051 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-20 06:18:51,051 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-20 06:18:51,166 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:18:51,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:18:51,988 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-11-20 06:18:51,988 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-11-20 06:18:52,073 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:18:52,102 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:18:52,102 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-20 06:18:52,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:18:52 BoogieIcfgContainer [2021-11-20 06:18:52,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:18:52,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:18:52,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:18:52,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:18:52,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:18:50" (1/3) ... [2021-11-20 06:18:52,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a740ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:18:52, skipping insertion in model container [2021-11-20 06:18:52,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:18:50" (2/3) ... [2021-11-20 06:18:52,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a740ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:18:52, skipping insertion in model container [2021-11-20 06:18:52,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:18:52" (3/3) ... [2021-11-20 06:18:52,118 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-1.c [2021-11-20 06:18:52,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:18:52,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:18:52,196 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:18:52,201 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 [2021-11-20 06:18:52,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:18:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 399 states, 344 states have (on average 1.619186046511628) internal successors, (557), 350 states have internal predecessors, (557), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-20 06:18:52,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:18:52,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:52,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:52,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1055313032, now seen corresponding path program 1 times [2021-11-20 06:18:52,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:52,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174015980] [2021-11-20 06:18:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:52,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:18:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:18:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:18:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:18:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:18:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:18:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:18:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:52,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:52,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174015980] [2021-11-20 06:18:52,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174015980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:52,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:52,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:18:52,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756477631] [2021-11-20 06:18:52,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:52,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:18:52,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:18:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:18:52,748 INFO L87 Difference]: Start difference. First operand has 399 states, 344 states have (on average 1.619186046511628) internal successors, (557), 350 states have internal predecessors, (557), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:18:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:54,132 INFO L93 Difference]: Finished difference Result 925 states and 1461 transitions. [2021-11-20 06:18:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:18:54,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-11-20 06:18:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:54,167 INFO L225 Difference]: With dead ends: 925 [2021-11-20 06:18:54,168 INFO L226 Difference]: Without dead ends: 540 [2021-11-20 06:18:54,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:18:54,190 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 752 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 2329 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:54,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 2329 Invalid, 1138 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [140 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:18:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-20 06:18:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 501. [2021-11-20 06:18:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 426 states have (on average 1.5070422535211268) internal successors, (642), 432 states have internal predecessors, (642), 51 states have call successors, (51), 21 states have call predecessors, (51), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2021-11-20 06:18:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 747 transitions. [2021-11-20 06:18:54,345 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 747 transitions. Word has length 65 [2021-11-20 06:18:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:54,346 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 747 transitions. [2021-11-20 06:18:54,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:18:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 747 transitions. [2021-11-20 06:18:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:18:54,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:54,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:54,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:18:54,365 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:54,366 INFO L85 PathProgramCache]: Analyzing trace with hash 623575608, now seen corresponding path program 1 times [2021-11-20 06:18:54,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:54,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846616341] [2021-11-20 06:18:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:54,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:18:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:18:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:18:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:18:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:18:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:18:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:18:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:54,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:54,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846616341] [2021-11-20 06:18:54,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846616341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:54,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:54,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:18:54,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609323931] [2021-11-20 06:18:54,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:54,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:18:54,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:18:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:18:54,578 INFO L87 Difference]: Start difference. First operand 501 states and 747 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:18:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:55,850 INFO L93 Difference]: Finished difference Result 898 states and 1313 transitions. [2021-11-20 06:18:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:18:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-11-20 06:18:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:55,857 INFO L225 Difference]: With dead ends: 898 [2021-11-20 06:18:55,857 INFO L226 Difference]: Without dead ends: 689 [2021-11-20 06:18:55,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:18:55,860 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 1426 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:55,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 2092 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:18:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-11-20 06:18:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 613. [2021-11-20 06:18:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 516 states have (on average 1.4883720930232558) internal successors, (768), 524 states have internal predecessors, (768), 64 states have call successors, (64), 28 states have call predecessors, (64), 31 states have return successors, (75), 64 states have call predecessors, (75), 62 states have call successors, (75) [2021-11-20 06:18:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 907 transitions. [2021-11-20 06:18:55,930 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 907 transitions. Word has length 65 [2021-11-20 06:18:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:55,930 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 907 transitions. [2021-11-20 06:18:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:18:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 907 transitions. [2021-11-20 06:18:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:18:55,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:55,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:55,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:18:55,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:55,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1405010502, now seen corresponding path program 1 times [2021-11-20 06:18:55,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010753561] [2021-11-20 06:18:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:55,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:55,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:18:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:18:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:18:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:56,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:18:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:56,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:18:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:56,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:18:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:56,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:18:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:56,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:56,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010753561] [2021-11-20 06:18:56,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010753561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:56,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:56,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:18:56,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591806336] [2021-11-20 06:18:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:56,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:18:56,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:18:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:18:56,047 INFO L87 Difference]: Start difference. First operand 613 states and 907 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:18:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:56,979 INFO L93 Difference]: Finished difference Result 1285 states and 1849 transitions. [2021-11-20 06:18:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:18:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-11-20 06:18:56,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:56,987 INFO L225 Difference]: With dead ends: 1285 [2021-11-20 06:18:56,988 INFO L226 Difference]: Without dead ends: 970 [2021-11-20 06:18:56,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:18:56,991 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 1529 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:56,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 1609 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:18:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-20 06:18:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 894. [2021-11-20 06:18:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 742 states have (on average 1.4487870619946093) internal successors, (1075), 754 states have internal predecessors, (1075), 94 states have call successors, (94), 49 states have call predecessors, (94), 56 states have return successors, (113), 94 states have call predecessors, (113), 92 states have call successors, (113) [2021-11-20 06:18:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1282 transitions. [2021-11-20 06:18:57,065 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1282 transitions. Word has length 65 [2021-11-20 06:18:57,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:57,066 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1282 transitions. [2021-11-20 06:18:57,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:18:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1282 transitions. [2021-11-20 06:18:57,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:18:57,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:57,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:57,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:18:57,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash 603910498, now seen corresponding path program 1 times [2021-11-20 06:18:57,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:57,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263580321] [2021-11-20 06:18:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:57,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:18:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:18:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:18:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:18:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:18:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:18:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:18:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:57,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:57,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263580321] [2021-11-20 06:18:57,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263580321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:57,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:57,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:18:57,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804102942] [2021-11-20 06:18:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:57,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:18:57,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:57,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:18:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:18:57,238 INFO L87 Difference]: Start difference. First operand 894 states and 1282 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:18:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:18:58,315 INFO L93 Difference]: Finished difference Result 1568 states and 2218 transitions. [2021-11-20 06:18:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:18:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-11-20 06:18:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:18:58,322 INFO L225 Difference]: With dead ends: 1568 [2021-11-20 06:18:58,322 INFO L226 Difference]: Without dead ends: 972 [2021-11-20 06:18:58,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:18:58,326 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 506 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:18:58,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 2757 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:18:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-11-20 06:18:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 909. [2021-11-20 06:18:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 754 states have (on average 1.4376657824933687) internal successors, (1084), 766 states have internal predecessors, (1084), 94 states have call successors, (94), 49 states have call predecessors, (94), 59 states have return successors, (116), 97 states have call predecessors, (116), 92 states have call successors, (116) [2021-11-20 06:18:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1294 transitions. [2021-11-20 06:18:58,392 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1294 transitions. Word has length 66 [2021-11-20 06:18:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:18:58,393 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1294 transitions. [2021-11-20 06:18:58,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:18:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1294 transitions. [2021-11-20 06:18:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:18:58,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:18:58,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:58,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:18:58,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:18:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:58,396 INFO L85 PathProgramCache]: Analyzing trace with hash -425448800, now seen corresponding path program 1 times [2021-11-20 06:18:58,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:58,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852330235] [2021-11-20 06:18:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:58,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:18:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:18:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:18:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:18:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:18:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:18:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-20 06:18:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:58,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852330235] [2021-11-20 06:18:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852330235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:18:58,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:18:58,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:18:58,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583741606] [2021-11-20 06:18:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:18:58,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:18:58,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:18:58,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:18:58,542 INFO L87 Difference]: Start difference. First operand 909 states and 1294 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:19:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:01,190 INFO L93 Difference]: Finished difference Result 3114 states and 4415 transitions. [2021-11-20 06:19:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:19:01,191 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-11-20 06:19:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:01,201 INFO L225 Difference]: With dead ends: 3114 [2021-11-20 06:19:01,201 INFO L226 Difference]: Without dead ends: 1272 [2021-11-20 06:19:01,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:19:01,213 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 2435 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:01,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2459 Valid, 2427 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 06:19:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-11-20 06:19:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1117. [2021-11-20 06:19:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 906 states have (on average 1.3995584988962473) internal successors, (1268), 922 states have internal predecessors, (1268), 124 states have call successors, (124), 70 states have call predecessors, (124), 85 states have return successors, (165), 128 states have call predecessors, (165), 122 states have call successors, (165) [2021-11-20 06:19:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1557 transitions. [2021-11-20 06:19:01,307 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1557 transitions. Word has length 66 [2021-11-20 06:19:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:01,307 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1557 transitions. [2021-11-20 06:19:01,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 6 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:19:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1557 transitions. [2021-11-20 06:19:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 06:19:01,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:01,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:01,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:19:01,310 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 661226175, now seen corresponding path program 1 times [2021-11-20 06:19:01,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:01,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069879439] [2021-11-20 06:19:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:01,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:19:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 06:19:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:19:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:19:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:19:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-20 06:19:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:01,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069879439] [2021-11-20 06:19:01,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069879439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:01,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:01,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:19:01,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471857890] [2021-11-20 06:19:01,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:01,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:19:01,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:19:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:19:01,465 INFO L87 Difference]: Start difference. First operand 1117 states and 1557 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:19:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:02,642 INFO L93 Difference]: Finished difference Result 2302 states and 3182 transitions. [2021-11-20 06:19:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:19:02,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-11-20 06:19:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:02,646 INFO L225 Difference]: With dead ends: 2302 [2021-11-20 06:19:02,646 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 06:19:02,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:19:02,655 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 1502 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:02,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 1923 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:19:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 06:19:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-11-20 06:19:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 249 states have (on average 1.5582329317269077) internal successors, (388), 250 states have internal predecessors, (388), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:19:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 432 transitions. [2021-11-20 06:19:02,675 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 432 transitions. Word has length 67 [2021-11-20 06:19:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:02,675 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 432 transitions. [2021-11-20 06:19:02,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:19:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 432 transitions. [2021-11-20 06:19:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:02,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:02,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:02,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:19:02,683 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1126190140, now seen corresponding path program 1 times [2021-11-20 06:19:02,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:02,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347930954] [2021-11-20 06:19:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:02,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:02,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:02,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:02,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:02,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:02,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347930954] [2021-11-20 06:19:02,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347930954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:02,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:02,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:19:02,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007150689] [2021-11-20 06:19:02,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:02,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:19:02,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:02,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:19:02,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:19:02,836 INFO L87 Difference]: Start difference. First operand 278 states and 432 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:04,071 INFO L93 Difference]: Finished difference Result 645 states and 1020 transitions. [2021-11-20 06:19:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:19:04,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:04,076 INFO L225 Difference]: With dead ends: 645 [2021-11-20 06:19:04,076 INFO L226 Difference]: Without dead ends: 376 [2021-11-20 06:19:04,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:19:04,079 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 728 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:04,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 777 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:19:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-20 06:19:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 278. [2021-11-20 06:19:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 249 states have (on average 1.5542168674698795) internal successors, (387), 250 states have internal predecessors, (387), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:19:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 431 transitions. [2021-11-20 06:19:04,112 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 431 transitions. Word has length 134 [2021-11-20 06:19:04,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:04,113 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 431 transitions. [2021-11-20 06:19:04,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 431 transitions. [2021-11-20 06:19:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:04,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:04,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:04,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:19:04,117 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash 179152254, now seen corresponding path program 1 times [2021-11-20 06:19:04,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:04,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399300197] [2021-11-20 06:19:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:04,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:04,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:04,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:04,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:04,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:04,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:04,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399300197] [2021-11-20 06:19:04,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399300197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:04,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:04,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:19:04,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044805989] [2021-11-20 06:19:04,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:04,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:19:04,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:19:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:19:04,282 INFO L87 Difference]: Start difference. First operand 278 states and 431 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:06,642 INFO L93 Difference]: Finished difference Result 1006 states and 1598 transitions. [2021-11-20 06:19:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:19:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:06,652 INFO L225 Difference]: With dead ends: 1006 [2021-11-20 06:19:06,653 INFO L226 Difference]: Without dead ends: 745 [2021-11-20 06:19:06,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:19:06,656 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 1093 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:06,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 1254 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:19:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-20 06:19:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 550. [2021-11-20 06:19:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 497 states have (on average 1.567404426559356) internal successors, (779), 499 states have internal predecessors, (779), 39 states have call successors, (39), 12 states have call predecessors, (39), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-11-20 06:19:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 860 transitions. [2021-11-20 06:19:06,719 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 860 transitions. Word has length 134 [2021-11-20 06:19:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:06,720 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 860 transitions. [2021-11-20 06:19:06,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 860 transitions. [2021-11-20 06:19:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:06,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:06,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:06,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:19:06,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1527351294, now seen corresponding path program 1 times [2021-11-20 06:19:06,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994213849] [2021-11-20 06:19:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:06,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:06,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:06,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:06,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:06,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:06,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:06,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994213849] [2021-11-20 06:19:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994213849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:06,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:06,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:06,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420928466] [2021-11-20 06:19:06,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:06,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:06,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:06,909 INFO L87 Difference]: Start difference. First operand 550 states and 860 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:09,922 INFO L93 Difference]: Finished difference Result 1659 states and 2636 transitions. [2021-11-20 06:19:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:19:09,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:09,934 INFO L225 Difference]: With dead ends: 1659 [2021-11-20 06:19:09,934 INFO L226 Difference]: Without dead ends: 1126 [2021-11-20 06:19:09,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:19:09,946 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1106 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:09,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 2141 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:19:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-11-20 06:19:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 803. [2021-11-20 06:19:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 726 states have (on average 1.5606060606060606) internal successors, (1133), 729 states have internal predecessors, (1133), 56 states have call successors, (56), 18 states have call predecessors, (56), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-11-20 06:19:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1250 transitions. [2021-11-20 06:19:10,039 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1250 transitions. Word has length 134 [2021-11-20 06:19:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:10,041 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1250 transitions. [2021-11-20 06:19:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1250 transitions. [2021-11-20 06:19:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:10,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:10,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:10,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:19:10,044 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash 474534976, now seen corresponding path program 1 times [2021-11-20 06:19:10,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:10,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225745028] [2021-11-20 06:19:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:10,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:10,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:10,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225745028] [2021-11-20 06:19:10,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225745028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:10,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:10,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:10,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064218751] [2021-11-20 06:19:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:10,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:10,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:10,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:10,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:10,242 INFO L87 Difference]: Start difference. First operand 803 states and 1250 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:12,882 INFO L93 Difference]: Finished difference Result 2621 states and 4154 transitions. [2021-11-20 06:19:12,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:19:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:12,897 INFO L225 Difference]: With dead ends: 2621 [2021-11-20 06:19:12,897 INFO L226 Difference]: Without dead ends: 1835 [2021-11-20 06:19:12,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:19:12,901 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1106 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2172 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:12,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 2127 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2172 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 06:19:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-11-20 06:19:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1310. [2021-11-20 06:19:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1185 states have (on average 1.5544303797468355) internal successors, (1842), 1190 states have internal predecessors, (1842), 90 states have call successors, (90), 30 states have call predecessors, (90), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-11-20 06:19:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2035 transitions. [2021-11-20 06:19:13,045 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2035 transitions. Word has length 134 [2021-11-20 06:19:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 2035 transitions. [2021-11-20 06:19:13,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2035 transitions. [2021-11-20 06:19:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:13,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:13,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:19:13,050 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2093287358, now seen corresponding path program 1 times [2021-11-20 06:19:13,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743956121] [2021-11-20 06:19:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:13,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:13,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:13,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:13,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:13,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:13,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:13,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:13,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:13,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743956121] [2021-11-20 06:19:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743956121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:13,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:13,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:13,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977254339] [2021-11-20 06:19:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:13,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:13,219 INFO L87 Difference]: Start difference. First operand 1310 states and 2035 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:15,961 INFO L93 Difference]: Finished difference Result 4469 states and 7055 transitions. [2021-11-20 06:19:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:19:15,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:15,988 INFO L225 Difference]: With dead ends: 4469 [2021-11-20 06:19:15,988 INFO L226 Difference]: Without dead ends: 3176 [2021-11-20 06:19:15,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:19:15,995 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 1178 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:15,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1193 Valid, 1488 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:19:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-11-20 06:19:16,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2330. [2021-11-20 06:19:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2109 states have (on average 1.5504978662873399) internal successors, (3270), 2118 states have internal predecessors, (3270), 158 states have call successors, (158), 54 states have call predecessors, (158), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-11-20 06:19:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3621 transitions. [2021-11-20 06:19:16,259 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3621 transitions. Word has length 134 [2021-11-20 06:19:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:16,260 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 3621 transitions. [2021-11-20 06:19:16,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3621 transitions. [2021-11-20 06:19:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:16,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:16,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:16,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:19:16,265 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:16,265 INFO L85 PathProgramCache]: Analyzing trace with hash 554316996, now seen corresponding path program 1 times [2021-11-20 06:19:16,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:16,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433977081] [2021-11-20 06:19:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:16,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:16,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:16,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:16,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:16,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433977081] [2021-11-20 06:19:16,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433977081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:16,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:16,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:16,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38140796] [2021-11-20 06:19:16,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:16,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:16,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:16,414 INFO L87 Difference]: Start difference. First operand 2330 states and 3621 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:19,634 INFO L93 Difference]: Finished difference Result 8175 states and 12891 transitions. [2021-11-20 06:19:19,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:19:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:19,679 INFO L225 Difference]: With dead ends: 8175 [2021-11-20 06:19:19,680 INFO L226 Difference]: Without dead ends: 5862 [2021-11-20 06:19:19,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:19:19,690 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 1100 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2144 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:19,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 2114 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2144 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:19:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-11-20 06:19:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 4375. [2021-11-20 06:19:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4375 states, 3962 states have (on average 1.547703180212014) internal successors, (6132), 3979 states have internal predecessors, (6132), 294 states have call successors, (294), 102 states have call predecessors, (294), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-11-20 06:19:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4375 states to 4375 states and 6817 transitions. [2021-11-20 06:19:20,244 INFO L78 Accepts]: Start accepts. Automaton has 4375 states and 6817 transitions. Word has length 134 [2021-11-20 06:19:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:20,244 INFO L470 AbstractCegarLoop]: Abstraction has 4375 states and 6817 transitions. [2021-11-20 06:19:20,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4375 states and 6817 transitions. [2021-11-20 06:19:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:20,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:20,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:20,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:19:20,253 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:20,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1577033726, now seen corresponding path program 1 times [2021-11-20 06:19:20,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:20,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838620107] [2021-11-20 06:19:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:20,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:20,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:20,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:20,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:20,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:20,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:20,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838620107] [2021-11-20 06:19:20,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838620107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:20,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:20,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:20,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436900084] [2021-11-20 06:19:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:20,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:20,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:20,433 INFO L87 Difference]: Start difference. First operand 4375 states and 6817 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:22,213 INFO L93 Difference]: Finished difference Result 10280 states and 16272 transitions. [2021-11-20 06:19:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:19:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:22,258 INFO L225 Difference]: With dead ends: 10280 [2021-11-20 06:19:22,258 INFO L226 Difference]: Without dead ends: 5922 [2021-11-20 06:19:22,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:19:22,275 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 912 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:22,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 981 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:19:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-11-20 06:19:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 4375. [2021-11-20 06:19:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4375 states, 3962 states have (on average 1.5434124179707218) internal successors, (6115), 3979 states have internal predecessors, (6115), 294 states have call successors, (294), 102 states have call predecessors, (294), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-11-20 06:19:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4375 states to 4375 states and 6800 transitions. [2021-11-20 06:19:22,736 INFO L78 Accepts]: Start accepts. Automaton has 4375 states and 6800 transitions. Word has length 134 [2021-11-20 06:19:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:22,737 INFO L470 AbstractCegarLoop]: Abstraction has 4375 states and 6800 transitions. [2021-11-20 06:19:22,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4375 states and 6800 transitions. [2021-11-20 06:19:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:22,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:22,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:22,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:19:22,743 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1679348996, now seen corresponding path program 1 times [2021-11-20 06:19:22,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382783617] [2021-11-20 06:19:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:22,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:22,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:22,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:22,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:22,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:22,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382783617] [2021-11-20 06:19:22,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382783617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:22,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:22,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:22,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591096759] [2021-11-20 06:19:22,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:22,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:22,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:22,883 INFO L87 Difference]: Start difference. First operand 4375 states and 6800 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:26,387 INFO L93 Difference]: Finished difference Result 15568 states and 24501 transitions. [2021-11-20 06:19:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:19:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:26,544 INFO L225 Difference]: With dead ends: 15568 [2021-11-20 06:19:26,544 INFO L226 Difference]: Without dead ends: 11210 [2021-11-20 06:19:26,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:19:26,568 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 1092 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:26,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1107 Valid, 2103 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:19:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11210 states. [2021-11-20 06:19:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11210 to 8497. [2021-11-20 06:19:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 7700 states have (on average 1.5406493506493506) internal successors, (11863), 7733 states have internal predecessors, (11863), 566 states have call successors, (566), 198 states have call predecessors, (566), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-11-20 06:19:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 13270 transitions. [2021-11-20 06:19:27,468 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 13270 transitions. Word has length 134 [2021-11-20 06:19:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:27,469 INFO L470 AbstractCegarLoop]: Abstraction has 8497 states and 13270 transitions. [2021-11-20 06:19:27,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 13270 transitions. [2021-11-20 06:19:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:27,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:27,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:27,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:19:27,480 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -293816382, now seen corresponding path program 1 times [2021-11-20 06:19:27,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:27,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095539721] [2021-11-20 06:19:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:27,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:27,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:27,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:27,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:27,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:27,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:27,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095539721] [2021-11-20 06:19:27,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095539721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:27,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:27,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:27,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818150002] [2021-11-20 06:19:27,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:27,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:27,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:27,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:27,650 INFO L87 Difference]: Start difference. First operand 8497 states and 13270 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:31,777 INFO L93 Difference]: Finished difference Result 30392 states and 48061 transitions. [2021-11-20 06:19:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:19:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:31,869 INFO L225 Difference]: With dead ends: 30392 [2021-11-20 06:19:31,869 INFO L226 Difference]: Without dead ends: 21912 [2021-11-20 06:19:31,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:19:31,913 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 1091 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:31,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 2098 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:19:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21912 states. [2021-11-20 06:19:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21912 to 16770. [2021-11-20 06:19:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16770 states, 15205 states have (on average 1.5390332127589608) internal successors, (23401), 15270 states have internal predecessors, (23401), 1110 states have call successors, (1110), 390 states have call predecessors, (1110), 454 states have return successors, (1903), 1173 states have call predecessors, (1903), 1110 states have call successors, (1903) [2021-11-20 06:19:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16770 states to 16770 states and 26414 transitions. [2021-11-20 06:19:33,500 INFO L78 Accepts]: Start accepts. Automaton has 16770 states and 26414 transitions. Word has length 134 [2021-11-20 06:19:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:33,500 INFO L470 AbstractCegarLoop]: Abstraction has 16770 states and 26414 transitions. [2021-11-20 06:19:33,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 16770 states and 26414 transitions. [2021-11-20 06:19:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:33,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:33,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:33,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:19:33,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1859290436, now seen corresponding path program 1 times [2021-11-20 06:19:33,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:33,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802336968] [2021-11-20 06:19:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:33,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:33,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:33,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:33,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:33,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:33,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802336968] [2021-11-20 06:19:33,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802336968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:33,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:33,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:33,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594617818] [2021-11-20 06:19:33,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:33,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:33,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:33,661 INFO L87 Difference]: Start difference. First operand 16770 states and 26414 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:40,594 INFO L93 Difference]: Finished difference Result 67783 states and 107557 transitions. [2021-11-20 06:19:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:19:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:40,845 INFO L225 Difference]: With dead ends: 67783 [2021-11-20 06:19:40,846 INFO L226 Difference]: Without dead ends: 51030 [2021-11-20 06:19:40,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:19:40,907 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 1173 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:40,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 2219 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:19:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51030 states. [2021-11-20 06:19:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51030 to 33187. [2021-11-20 06:19:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33187 states, 30150 states have (on average 1.5403980099502488) internal successors, (46443), 30279 states have internal predecessors, (46443), 2134 states have call successors, (2134), 774 states have call predecessors, (2134), 902 states have return successors, (4449), 2261 states have call predecessors, (4449), 2134 states have call successors, (4449) [2021-11-20 06:19:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33187 states to 33187 states and 53026 transitions. [2021-11-20 06:19:44,274 INFO L78 Accepts]: Start accepts. Automaton has 33187 states and 53026 transitions. Word has length 134 [2021-11-20 06:19:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:19:44,275 INFO L470 AbstractCegarLoop]: Abstraction has 33187 states and 53026 transitions. [2021-11-20 06:19:44,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:44,275 INFO L276 IsEmpty]: Start isEmpty. Operand 33187 states and 53026 transitions. [2021-11-20 06:19:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:19:44,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:19:44,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:44,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:19:44,315 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:19:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:44,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1236008834, now seen corresponding path program 1 times [2021-11-20 06:19:44,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:44,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322145857] [2021-11-20 06:19:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:44,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:44,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:19:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:19:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:19:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:44,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:19:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:44,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:19:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:44,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322145857] [2021-11-20 06:19:44,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322145857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:19:44,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:19:44,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:19:44,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484373789] [2021-11-20 06:19:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:19:44,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:19:44,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:19:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:19:44,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:19:44,635 INFO L87 Difference]: Start difference. First operand 33187 states and 53026 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:19:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:19:55,863 INFO L93 Difference]: Finished difference Result 132710 states and 213419 transitions. [2021-11-20 06:19:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:19:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-11-20 06:19:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:19:56,454 INFO L225 Difference]: With dead ends: 132710 [2021-11-20 06:19:56,454 INFO L226 Difference]: Without dead ends: 99540 [2021-11-20 06:19:56,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:19:56,593 INFO L933 BasicCegarLoop]: 668 mSDtfsCounter, 1382 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 2082 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1406 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:19:56,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1406 Valid, 2072 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2082 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:19:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99540 states. [2021-11-20 06:20:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99540 to 65316. [2021-11-20 06:20:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65316 states, 59399 states have (on average 1.5415242680853214) internal successors, (91565), 59656 states have internal predecessors, (91565), 4118 states have call successors, (4118), 1542 states have call predecessors, (4118), 1798 states have return successors, (10935), 4373 states have call predecessors, (10935), 4118 states have call successors, (10935) [2021-11-20 06:20:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65316 states to 65316 states and 106618 transitions. [2021-11-20 06:20:03,160 INFO L78 Accepts]: Start accepts. Automaton has 65316 states and 106618 transitions. Word has length 134 [2021-11-20 06:20:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:03,160 INFO L470 AbstractCegarLoop]: Abstraction has 65316 states and 106618 transitions. [2021-11-20 06:20:03,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:20:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 65316 states and 106618 transitions. [2021-11-20 06:20:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:20:03,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:03,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:03,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:20:03,442 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:03,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1354450308, now seen corresponding path program 1 times [2021-11-20 06:20:03,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:03,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321885560] [2021-11-20 06:20:03,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:03,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:20:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:20:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:20:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:20:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:20:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:03,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321885560] [2021-11-20 06:20:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321885560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:03,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:20:03,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748555246] [2021-11-20 06:20:03,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:03,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:20:03,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:20:03,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:03,645 INFO L87 Difference]: Start difference. First operand 65316 states and 106618 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)