./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.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_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/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_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/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_42b6c194-5be2-4716-97c7-786bb3e7e015/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 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:08:49,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:08:49,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:08:49,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:08:49,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:08:49,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:08:49,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:08:49,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:08:49,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:08:49,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:08:49,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:08:49,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:08:49,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:08:49,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:08:49,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:08:49,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:08:49,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:08:49,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:08:49,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:08:49,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:08:49,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:08:49,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:08:49,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:08:49,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:08:49,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:08:49,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:08:49,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:08:49,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:08:49,933 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:08:49,934 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:08:49,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:08:49,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:08:49,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:08:49,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:08:49,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:08:49,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:08:49,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:08:49,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:08:49,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:08:49,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:08:49,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:08:49,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:08:49,972 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:08:49,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:08:49,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:08:49,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:08:49,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:08:49,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:08:49,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:08:49,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:08:49,975 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:08:49,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:08:49,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:08:49,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:08:49,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:08:49,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:08:49,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:08:49,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:08:49,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:08:49,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:08:49,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:08:49,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:08:49,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:08:49,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:08:49,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:08:49,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:08:49,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:49,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:08:49,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:08:49,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:08:49,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:08:49,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:08:49,980 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:08:49,980 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:08:49,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:08:49,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:08:49,980 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_42b6c194-5be2-4716-97c7-786bb3e7e015/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5af94617941f44648ac9498189d5e73562b4cbf6ae0ea00b10262137b50bb0 [2021-11-20 06:08:50,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:08:50,243 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:08:50,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:08:50,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:08:50,248 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:08:50,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-20 06:08:50,319 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/data/f28d2fab9/9ee5b14d95184e848d3b1e6a1abd00c5/FLAG260291b24 [2021-11-20 06:08:50,934 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:08:50,935 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c [2021-11-20 06:08:50,971 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/data/f28d2fab9/9ee5b14d95184e848d3b1e6a1abd00c5/FLAG260291b24 [2021-11-20 06:08:51,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/data/f28d2fab9/9ee5b14d95184e848d3b1e6a1abd00c5 [2021-11-20 06:08:51,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:08:51,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:08:51,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:51,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:08:51,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:08:51,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:51" (1/1) ... [2021-11-20 06:08:51,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cafae9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:51, skipping insertion in model container [2021-11-20 06:08:51,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:51" (1/1) ... [2021-11-20 06:08:51,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:08:51,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:08:52,058 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_42b6c194-5be2-4716-97c7-786bb3e7e015/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-20 06:08:52,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:52,138 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:08:52,262 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_42b6c194-5be2-4716-97c7-786bb3e7e015/sv-benchmarks/c/product-lines/email_spec11_productSimulator.cil.c[48047,48060] [2021-11-20 06:08:52,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:52,354 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:08:52,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52 WrapperNode [2021-11-20 06:08:52,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:52,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:52,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:08:52,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:08:52,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,522 INFO L137 Inliner]: procedures = 151, calls = 282, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1306 [2021-11-20 06:08:52,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:52,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:08:52,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:08:52,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:08:52,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:08:52,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:08:52,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:08:52,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:08:52,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (1/1) ... [2021-11-20 06:08:52,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:52,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:52,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:08:52,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:08:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-20 06:08:52,749 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-20 06:08:52,749 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-20 06:08:52,749 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-20 06:08:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-20 06:08:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-20 06:08:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-20 06:08:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-20 06:08:52,750 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-20 06:08:52,750 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-20 06:08:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-20 06:08:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-20 06:08:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-20 06:08:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-20 06:08:52,751 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-20 06:08:52,751 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-20 06:08:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-20 06:08:52,752 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-20 06:08:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-20 06:08:52,752 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-20 06:08:52,752 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-20 06:08:52,752 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-20 06:08:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-20 06:08:52,753 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-20 06:08:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-20 06:08:52,753 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-20 06:08:52,753 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-20 06:08:52,753 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-20 06:08:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-20 06:08:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-20 06:08:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-20 06:08:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-20 06:08:52,754 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-20 06:08:52,754 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-20 06:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-20 06:08:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-20 06:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-20 06:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-20 06:08:52,755 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-20 06:08:52,755 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-20 06:08:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-20 06:08:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-20 06:08:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-20 06:08:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-20 06:08:52,756 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-20 06:08:52,756 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-20 06:08:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-20 06:08:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:08:52,757 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-20 06:08:52,757 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-20 06:08:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-20 06:08:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-20 06:08:52,758 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-20 06:08:52,758 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-20 06:08:52,760 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-20 06:08:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-20 06:08:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-20 06:08:52,762 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-20 06:08:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-20 06:08:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-20 06:08:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-20 06:08:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-20 06:08:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-20 06:08:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-20 06:08:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-20 06:08:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-20 06:08:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-20 06:08:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-20 06:08:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-20 06:08:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-20 06:08:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-20 06:08:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-20 06:08:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-20 06:08:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-20 06:08:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-20 06:08:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-20 06:08:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-20 06:08:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-20 06:08:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-20 06:08:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-20 06:08:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:08:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-20 06:08:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-20 06:08:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-20 06:08:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-20 06:08:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-20 06:08:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-20 06:08:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-20 06:08:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-20 06:08:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:08:52,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:08:53,127 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:08:53,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:08:54,165 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:08:54,188 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:08:54,188 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:08:54,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:54 BoogieIcfgContainer [2021-11-20 06:08:54,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:08:54,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:08:54,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:08:54,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:08:54,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:08:51" (1/3) ... [2021-11-20 06:08:54,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d302a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:54, skipping insertion in model container [2021-11-20 06:08:54,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:52" (2/3) ... [2021-11-20 06:08:54,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d302a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:54, skipping insertion in model container [2021-11-20 06:08:54,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:54" (3/3) ... [2021-11-20 06:08:54,205 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_productSimulator.cil.c [2021-11-20 06:08:54,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:08:54,213 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:08:54,272 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:08:54,279 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 06:08:54,279 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:08:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 600 states, 446 states have (on average 1.515695067264574) internal successors, (676), 466 states have internal predecessors, (676), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-20 06:08:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 06:08:54,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:54,344 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:54,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2015100890, now seen corresponding path program 1 times [2021-11-20 06:08:54,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:54,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489879089] [2021-11-20 06:08:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:54,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:08:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:08:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:08:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:08:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:08:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:08:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:08:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:08:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:08:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:08:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:08:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-20 06:08:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 06:08:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 06:08:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 06:08:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:08:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 06:08:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:08:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:08:54,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:54,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489879089] [2021-11-20 06:08:54,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489879089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:54,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:54,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:08:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839135739] [2021-11-20 06:08:54,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:54,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:08:54,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:54,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:08:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:54,967 INFO L87 Difference]: Start difference. First operand has 600 states, 446 states have (on average 1.515695067264574) internal successors, (676), 466 states have internal predecessors, (676), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:08:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:56,436 INFO L93 Difference]: Finished difference Result 1063 states and 1612 transitions. [2021-11-20 06:08:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:08:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 156 [2021-11-20 06:08:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:56,469 INFO L225 Difference]: With dead ends: 1063 [2021-11-20 06:08:56,469 INFO L226 Difference]: Without dead ends: 725 [2021-11-20 06:08:56,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:08:56,480 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1357 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:56,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1364 Valid, 1618 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:08:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-20 06:08:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 593. [2021-11-20 06:08:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 440 states have (on average 1.5113636363636365) internal successors, (665), 459 states have internal predecessors, (665), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 06:08:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 882 transitions. [2021-11-20 06:08:56,658 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 882 transitions. Word has length 156 [2021-11-20 06:08:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 882 transitions. [2021-11-20 06:08:56,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:08:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 882 transitions. [2021-11-20 06:08:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-20 06:08:56,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:56,671 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:08:56,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:56,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1644639793, now seen corresponding path program 1 times [2021-11-20 06:08:56,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:56,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848786694] [2021-11-20 06:08:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:56,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:08:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:08:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:08:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:08:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:08:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:08:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:08:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:08:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-20 06:08:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:08:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:08:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-20 06:08:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:08:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 06:08:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-20 06:08:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 06:08:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:08:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:08:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:08:57,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848786694] [2021-11-20 06:08:57,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848786694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:57,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:57,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:08:57,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712318551] [2021-11-20 06:08:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:57,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:08:57,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:08:57,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:08:57,006 INFO L87 Difference]: Start difference. First operand 593 states and 882 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:08:59,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:59,406 INFO L93 Difference]: Finished difference Result 1282 states and 1935 transitions. [2021-11-20 06:08:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:08:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 157 [2021-11-20 06:08:59,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:59,414 INFO L225 Difference]: With dead ends: 1282 [2021-11-20 06:08:59,414 INFO L226 Difference]: Without dead ends: 725 [2021-11-20 06:08:59,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:08:59,418 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 1349 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:59,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 2794 Invalid, 2972 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [643 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:08:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-20 06:08:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 593. [2021-11-20 06:08:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 440 states have (on average 1.4954545454545454) internal successors, (658), 459 states have internal predecessors, (658), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 06:08:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 875 transitions. [2021-11-20 06:08:59,475 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 875 transitions. Word has length 157 [2021-11-20 06:08:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:59,476 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 875 transitions. [2021-11-20 06:08:59,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:08:59,476 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 875 transitions. [2021-11-20 06:08:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-20 06:08:59,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:59,481 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:59,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:08:59,482 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1683806924, now seen corresponding path program 1 times [2021-11-20 06:08:59,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:59,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526581323] [2021-11-20 06:08:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:59,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:08:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:08:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:08:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:08:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:08:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:08:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:08:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:08:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:08:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:08:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:08:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:08:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:08:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 06:08:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 06:08:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 06:08:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 06:08:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 06:08:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:08:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 06:08:59,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:59,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526581323] [2021-11-20 06:08:59,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526581323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661021094] [2021-11-20 06:08:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:59,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:59,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:59,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:09:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:09:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-20 06:09:00,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:00,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661021094] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:00,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:00,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-20 06:09:00,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184662180] [2021-11-20 06:09:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:00,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:00,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:09:00,590 INFO L87 Difference]: Start difference. First operand 593 states and 875 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:00,635 INFO L93 Difference]: Finished difference Result 921 states and 1333 transitions. [2021-11-20 06:09:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 162 [2021-11-20 06:09:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:00,641 INFO L225 Difference]: With dead ends: 921 [2021-11-20 06:09:00,641 INFO L226 Difference]: Without dead ends: 596 [2021-11-20 06:09:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:09:00,645 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 1 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:00,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1744 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:09:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-11-20 06:09:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 595. [2021-11-20 06:09:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 442 states have (on average 1.493212669683258) internal successors, (660), 461 states have internal predecessors, (660), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-20 06:09:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 877 transitions. [2021-11-20 06:09:00,694 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 877 transitions. Word has length 162 [2021-11-20 06:09:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:00,695 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 877 transitions. [2021-11-20 06:09:00,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 877 transitions. [2021-11-20 06:09:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-20 06:09:00,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:00,700 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:00,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:09:00,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:00,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1892392765, now seen corresponding path program 1 times [2021-11-20 06:09:00,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:00,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586494637] [2021-11-20 06:09:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:00,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:00,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:00,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:00,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:00,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:09:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:09:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 06:09:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-11-20 06:09:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-11-20 06:09:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 06:09:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-20 06:09:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:09:01,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586494637] [2021-11-20 06:09:01,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586494637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961383081] [2021-11-20 06:09:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:01,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:01,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:01,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:01,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:09:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:09:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 06:09:01,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961383081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:01,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2021-11-20 06:09:01,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100483395] [2021-11-20 06:09:01,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:01,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:09:01,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:01,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:09:01,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:09:01,904 INFO L87 Difference]: Start difference. First operand 595 states and 877 transitions. Second operand has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 7 states have internal predecessors, (101), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:09:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:02,034 INFO L93 Difference]: Finished difference Result 1136 states and 1682 transitions. [2021-11-20 06:09:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:09:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 7 states have internal predecessors, (101), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 169 [2021-11-20 06:09:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:02,042 INFO L225 Difference]: With dead ends: 1136 [2021-11-20 06:09:02,042 INFO L226 Difference]: Without dead ends: 599 [2021-11-20 06:09:02,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:09:02,047 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 196 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 4953 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:02,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 4953 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:09:02,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-11-20 06:09:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 599. [2021-11-20 06:09:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 444 states have (on average 1.490990990990991) internal successors, (662), 464 states have internal predecessors, (662), 109 states have call successors, (109), 43 states have call predecessors, (109), 45 states have return successors, (112), 108 states have call predecessors, (112), 108 states have call successors, (112) [2021-11-20 06:09:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 883 transitions. [2021-11-20 06:09:02,106 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 883 transitions. Word has length 169 [2021-11-20 06:09:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:02,106 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 883 transitions. [2021-11-20 06:09:02,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 7 states have internal predecessors, (101), 4 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:09:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 883 transitions. [2021-11-20 06:09:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-20 06:09:02,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:02,112 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:02,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:02,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash 95242608, now seen corresponding path program 1 times [2021-11-20 06:09:02,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:02,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907429033] [2021-11-20 06:09:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:02,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-20 06:09:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 06:09:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-20 06:09:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-20 06:09:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:09:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 06:09:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:09:02,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:02,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907429033] [2021-11-20 06:09:02,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907429033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:02,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:02,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:09:02,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521742356] [2021-11-20 06:09:02,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:02,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:09:02,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:02,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:09:02,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:02,555 INFO L87 Difference]: Start difference. First operand 599 states and 883 transitions. Second operand has 10 states, 9 states have (on average 11.11111111111111) internal successors, (100), 7 states have internal predecessors, (100), 4 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:09:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:05,518 INFO L93 Difference]: Finished difference Result 1254 states and 1889 transitions. [2021-11-20 06:09:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:09:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.11111111111111) internal successors, (100), 7 states have internal predecessors, (100), 4 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 170 [2021-11-20 06:09:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:05,528 INFO L225 Difference]: With dead ends: 1254 [2021-11-20 06:09:05,528 INFO L226 Difference]: Without dead ends: 733 [2021-11-20 06:09:05,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:09:05,531 INFO L933 BasicCegarLoop]: 854 mSDtfsCounter, 1559 mSDsluCounter, 2416 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 3270 SdHoareTripleChecker+Invalid, 4164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:05,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 3270 Invalid, 4164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [668 Valid, 3496 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 06:09:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-11-20 06:09:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 601. [2021-11-20 06:09:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 445 states have (on average 1.489887640449438) internal successors, (663), 465 states have internal predecessors, (663), 109 states have call successors, (109), 43 states have call predecessors, (109), 46 states have return successors, (113), 109 states have call predecessors, (113), 108 states have call successors, (113) [2021-11-20 06:09:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 885 transitions. [2021-11-20 06:09:05,584 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 885 transitions. Word has length 170 [2021-11-20 06:09:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:05,585 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 885 transitions. [2021-11-20 06:09:05,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.11111111111111) internal successors, (100), 7 states have internal predecessors, (100), 4 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:09:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 885 transitions. [2021-11-20 06:09:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-20 06:09:05,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:05,592 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:05,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:09:05,592 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash -615292350, now seen corresponding path program 2 times [2021-11-20 06:09:05,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:05,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976265720] [2021-11-20 06:09:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:05,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-20 06:09:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 06:09:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-11-20 06:09:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-20 06:09:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 06:09:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-20 06:09:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 06:09:05,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:05,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976265720] [2021-11-20 06:09:05,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976265720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:05,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:05,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:09:05,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499651069] [2021-11-20 06:09:05,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:05,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:09:05,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:09:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:05,863 INFO L87 Difference]: Start difference. First operand 601 states and 885 transitions. Second operand has 10 states, 9 states have (on average 11.222222222222221) internal successors, (101), 7 states have internal predecessors, (101), 4 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:09:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:08,912 INFO L93 Difference]: Finished difference Result 1258 states and 1895 transitions. [2021-11-20 06:09:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:09:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 11.222222222222221) internal successors, (101), 7 states have internal predecessors, (101), 4 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 171 [2021-11-20 06:09:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:08,918 INFO L225 Difference]: With dead ends: 1258 [2021-11-20 06:09:08,918 INFO L226 Difference]: Without dead ends: 737 [2021-11-20 06:09:08,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:09:08,922 INFO L933 BasicCegarLoop]: 869 mSDtfsCounter, 1531 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 4279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:08,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 3311 Invalid, 4279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:09:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-20 06:09:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 603. [2021-11-20 06:09:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 446 states have (on average 1.4887892376681615) internal successors, (664), 467 states have internal predecessors, (664), 109 states have call successors, (109), 43 states have call predecessors, (109), 47 states have return successors, (116), 109 states have call predecessors, (116), 108 states have call successors, (116) [2021-11-20 06:09:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 889 transitions. [2021-11-20 06:09:08,971 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 889 transitions. Word has length 171 [2021-11-20 06:09:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:08,971 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 889 transitions. [2021-11-20 06:09:08,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 11.222222222222221) internal successors, (101), 7 states have internal predecessors, (101), 4 states have call successors, (29), 5 states have call predecessors, (29), 3 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-20 06:09:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 889 transitions. [2021-11-20 06:09:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 06:09:08,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:08,976 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:08,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:09:08,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1506290165, now seen corresponding path program 1 times [2021-11-20 06:09:08,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:08,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717535005] [2021-11-20 06:09:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:08,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:09:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:09:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-20 06:09:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:09:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 06:09:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 06:09:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:09,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:09,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717535005] [2021-11-20 06:09:09,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717535005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:09,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388769067] [2021-11-20 06:09:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:09,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:09,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:09,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:09:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:09:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:09,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:09:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:10,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388769067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:09:10,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:09:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-11-20 06:09:10,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251222230] [2021-11-20 06:09:10,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:09:10,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:09:10,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:09:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:10,157 INFO L87 Difference]: Start difference. First operand 603 states and 889 transitions. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 7 states have internal predecessors, (138), 2 states have call successors, (45), 5 states have call predecessors, (45), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 06:09:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:13,126 INFO L93 Difference]: Finished difference Result 1441 states and 2224 transitions. [2021-11-20 06:09:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:09:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 7 states have internal predecessors, (138), 2 states have call successors, (45), 5 states have call predecessors, (45), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 172 [2021-11-20 06:09:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:13,135 INFO L225 Difference]: With dead ends: 1441 [2021-11-20 06:09:13,135 INFO L226 Difference]: Without dead ends: 1116 [2021-11-20 06:09:13,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:09:13,138 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 1870 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 3279 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1930 SdHoareTripleChecker+Valid, 3391 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 3279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:13,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1930 Valid, 3391 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 3279 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:09:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-11-20 06:09:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 960. [2021-11-20 06:09:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 752 states have (on average 1.565159574468085) internal successors, (1177), 779 states have internal predecessors, (1177), 160 states have call successors, (160), 43 states have call predecessors, (160), 47 states have return successors, (167), 160 states have call predecessors, (167), 159 states have call successors, (167) [2021-11-20 06:09:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1504 transitions. [2021-11-20 06:09:13,205 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1504 transitions. Word has length 172 [2021-11-20 06:09:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:13,205 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1504 transitions. [2021-11-20 06:09:13,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 7 states have internal predecessors, (138), 2 states have call successors, (45), 5 states have call predecessors, (45), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 06:09:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1504 transitions. [2021-11-20 06:09:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 06:09:13,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:13,213 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:13,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:13,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:09:13,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1880528848, now seen corresponding path program 1 times [2021-11-20 06:09:13,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:13,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612698028] [2021-11-20 06:09:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:13,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:09:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 06:09:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-20 06:09:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 06:09:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-20 06:09:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-20 06:09:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:13,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612698028] [2021-11-20 06:09:13,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612698028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:13,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:13,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:13,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413733006] [2021-11-20 06:09:13,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:13,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:13,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:13,643 INFO L87 Difference]: Start difference. First operand 960 states and 1504 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:15,631 INFO L93 Difference]: Finished difference Result 2215 states and 3537 transitions. [2021-11-20 06:09:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 177 [2021-11-20 06:09:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:15,642 INFO L225 Difference]: With dead ends: 2215 [2021-11-20 06:09:15,643 INFO L226 Difference]: Without dead ends: 1372 [2021-11-20 06:09:15,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:15,647 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 1539 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:15,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1565 Valid, 1915 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:09:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-11-20 06:09:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1232. [2021-11-20 06:09:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 982 states have (on average 1.579429735234216) internal successors, (1551), 1015 states have internal predecessors, (1551), 202 states have call successors, (202), 43 states have call predecessors, (202), 47 states have return successors, (209), 202 states have call predecessors, (209), 201 states have call successors, (209) [2021-11-20 06:09:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1962 transitions. [2021-11-20 06:09:15,726 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1962 transitions. Word has length 177 [2021-11-20 06:09:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:15,726 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1962 transitions. [2021-11-20 06:09:15,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1962 transitions. [2021-11-20 06:09:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-20 06:09:15,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:15,735 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:15,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:09:15,736 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1123450082, now seen corresponding path program 1 times [2021-11-20 06:09:15,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:15,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603364748] [2021-11-20 06:09:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:15,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:09:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:09:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 06:09:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 06:09:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-20 06:09:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 06:09:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:15,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:15,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603364748] [2021-11-20 06:09:15,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603364748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:15,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:15,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364935239] [2021-11-20 06:09:15,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:15,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:15,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:15,927 INFO L87 Difference]: Start difference. First operand 1232 states and 1962 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:17,840 INFO L93 Difference]: Finished difference Result 2966 states and 4816 transitions. [2021-11-20 06:09:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 178 [2021-11-20 06:09:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:17,857 INFO L225 Difference]: With dead ends: 2966 [2021-11-20 06:09:17,857 INFO L226 Difference]: Without dead ends: 1873 [2021-11-20 06:09:17,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:17,862 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 1523 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 693 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 693 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:17,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 2012 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [693 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:09:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-20 06:09:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1733. [2021-11-20 06:09:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1404 states have (on average 1.599002849002849) internal successors, (2245), 1447 states have internal predecessors, (2245), 281 states have call successors, (281), 43 states have call predecessors, (281), 47 states have return successors, (288), 281 states have call predecessors, (288), 280 states have call successors, (288) [2021-11-20 06:09:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2814 transitions. [2021-11-20 06:09:17,970 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2814 transitions. Word has length 178 [2021-11-20 06:09:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:17,971 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 2814 transitions. [2021-11-20 06:09:17,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 3 states have internal predecessors, (106), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2814 transitions. [2021-11-20 06:09:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 06:09:17,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:17,984 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:17,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:09:17,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:17,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1233552762, now seen corresponding path program 1 times [2021-11-20 06:09:17,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:17,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783567436] [2021-11-20 06:09:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:17,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:09:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 06:09:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 06:09:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 06:09:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-20 06:09:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 06:09:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:18,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:18,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783567436] [2021-11-20 06:09:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783567436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:18,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:18,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:18,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968752859] [2021-11-20 06:09:18,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:18,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:18,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:18,129 INFO L87 Difference]: Start difference. First operand 1733 states and 2814 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:20,059 INFO L93 Difference]: Finished difference Result 4213 states and 6941 transitions. [2021-11-20 06:09:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:20,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2021-11-20 06:09:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:20,083 INFO L225 Difference]: With dead ends: 4213 [2021-11-20 06:09:20,083 INFO L226 Difference]: Without dead ends: 2682 [2021-11-20 06:09:20,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:20,092 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1519 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:20,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 1962 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:09:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-11-20 06:09:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2542. [2021-11-20 06:09:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2094 states have (on average 1.6131805157593124) internal successors, (3378), 2153 states have internal predecessors, (3378), 400 states have call successors, (400), 43 states have call predecessors, (400), 47 states have return successors, (407), 400 states have call predecessors, (407), 399 states have call successors, (407) [2021-11-20 06:09:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 4185 transitions. [2021-11-20 06:09:20,312 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 4185 transitions. Word has length 179 [2021-11-20 06:09:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:20,313 INFO L470 AbstractCegarLoop]: Abstraction has 2542 states and 4185 transitions. [2021-11-20 06:09:20,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 4185 transitions. [2021-11-20 06:09:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 06:09:20,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:20,336 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:20,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:09:20,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1986337367, now seen corresponding path program 1 times [2021-11-20 06:09:20,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:20,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301920338] [2021-11-20 06:09:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:20,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:09:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:09:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-20 06:09:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:09:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-20 06:09:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-11-20 06:09:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:20,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301920338] [2021-11-20 06:09:20,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301920338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:20,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:20,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:20,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661665894] [2021-11-20 06:09:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:20,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:20,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:20,514 INFO L87 Difference]: Start difference. First operand 2542 states and 4185 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:22,392 INFO L93 Difference]: Finished difference Result 6112 states and 10173 transitions. [2021-11-20 06:09:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 180 [2021-11-20 06:09:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:22,420 INFO L225 Difference]: With dead ends: 6112 [2021-11-20 06:09:22,421 INFO L226 Difference]: Without dead ends: 3929 [2021-11-20 06:09:22,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:22,434 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 1537 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:22,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 1990 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:09:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-11-20 06:09:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3789. [2021-11-20 06:09:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3179 states have (on average 1.6240956275558351) internal successors, (5163), 3264 states have internal predecessors, (5163), 562 states have call successors, (562), 43 states have call predecessors, (562), 47 states have return successors, (569), 562 states have call predecessors, (569), 561 states have call successors, (569) [2021-11-20 06:09:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 6294 transitions. [2021-11-20 06:09:22,635 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 6294 transitions. Word has length 180 [2021-11-20 06:09:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:22,640 INFO L470 AbstractCegarLoop]: Abstraction has 3789 states and 6294 transitions. [2021-11-20 06:09:22,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 6294 transitions. [2021-11-20 06:09:22,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-20 06:09:22,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:22,673 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:22,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:09:22,673 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2049043650, now seen corresponding path program 1 times [2021-11-20 06:09:22,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:22,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713194645] [2021-11-20 06:09:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:22,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-20 06:09:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 06:09:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-11-20 06:09:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 06:09:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-20 06:09:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-20 06:09:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:22,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:22,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713194645] [2021-11-20 06:09:22,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713194645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:22,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:22,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:22,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867957959] [2021-11-20 06:09:22,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:22,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:22,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:22,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:22,878 INFO L87 Difference]: Start difference. First operand 3789 states and 6294 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:24,643 INFO L93 Difference]: Finished difference Result 9114 states and 15280 transitions. [2021-11-20 06:09:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:24,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 181 [2021-11-20 06:09:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:24,681 INFO L225 Difference]: With dead ends: 9114 [2021-11-20 06:09:24,681 INFO L226 Difference]: Without dead ends: 5943 [2021-11-20 06:09:24,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:24,693 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 1540 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:24,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 1961 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:09:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2021-11-20 06:09:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 5803. [2021-11-20 06:09:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 4948 states have (on average 1.6321746160064672) internal successors, (8076), 5077 states have internal predecessors, (8076), 807 states have call successors, (807), 43 states have call predecessors, (807), 47 states have return successors, (814), 807 states have call predecessors, (814), 806 states have call successors, (814) [2021-11-20 06:09:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 9697 transitions. [2021-11-20 06:09:25,111 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 9697 transitions. Word has length 181 [2021-11-20 06:09:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:25,112 INFO L470 AbstractCegarLoop]: Abstraction has 5803 states and 9697 transitions. [2021-11-20 06:09:25,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 9697 transitions. [2021-11-20 06:09:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 06:09:25,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:25,159 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:09:25,160 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 945742769, now seen corresponding path program 1 times [2021-11-20 06:09:25,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872051649] [2021-11-20 06:09:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:25,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-20 06:09:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 06:09:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-11-20 06:09:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:09:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-20 06:09:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-20 06:09:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:25,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872051649] [2021-11-20 06:09:25,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872051649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:25,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:25,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:25,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242142639] [2021-11-20 06:09:25,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:25,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:25,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:25,336 INFO L87 Difference]: Start difference. First operand 5803 states and 9697 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:27,202 INFO L93 Difference]: Finished difference Result 14107 states and 23775 transitions. [2021-11-20 06:09:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:27,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2021-11-20 06:09:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:27,260 INFO L225 Difference]: With dead ends: 14107 [2021-11-20 06:09:27,260 INFO L226 Difference]: Without dead ends: 9318 [2021-11-20 06:09:27,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:27,278 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 1514 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1539 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:27,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1539 Valid, 1989 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:09:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9318 states. [2021-11-20 06:09:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9318 to 9178. [2021-11-20 06:09:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9178 states, 7830 states have (on average 1.6339719029374202) internal successors, (12794), 8037 states have internal predecessors, (12794), 1300 states have call successors, (1300), 43 states have call predecessors, (1300), 47 states have return successors, (1307), 1300 states have call predecessors, (1307), 1299 states have call successors, (1307) [2021-11-20 06:09:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9178 states to 9178 states and 15401 transitions. [2021-11-20 06:09:27,871 INFO L78 Accepts]: Start accepts. Automaton has 9178 states and 15401 transitions. Word has length 182 [2021-11-20 06:09:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:27,871 INFO L470 AbstractCegarLoop]: Abstraction has 9178 states and 15401 transitions. [2021-11-20 06:09:27,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 3 states have internal predecessors, (110), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 9178 states and 15401 transitions. [2021-11-20 06:09:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-20 06:09:27,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:27,931 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:27,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:09:27,931 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash -946621950, now seen corresponding path program 1 times [2021-11-20 06:09:27,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:27,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119295609] [2021-11-20 06:09:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:27,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:09:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-20 06:09:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 06:09:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 06:09:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-11-20 06:09:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 06:09:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:28,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:28,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119295609] [2021-11-20 06:09:28,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119295609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:28,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:28,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:28,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171779610] [2021-11-20 06:09:28,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:28,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:28,100 INFO L87 Difference]: Start difference. First operand 9178 states and 15401 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:30,389 INFO L93 Difference]: Finished difference Result 23060 states and 39002 transitions. [2021-11-20 06:09:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 183 [2021-11-20 06:09:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:30,466 INFO L225 Difference]: With dead ends: 23060 [2021-11-20 06:09:30,466 INFO L226 Difference]: Without dead ends: 15392 [2021-11-20 06:09:30,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:30,499 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 1531 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:30,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 2009 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:09:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15392 states. [2021-11-20 06:09:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15392 to 15252. [2021-11-20 06:09:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15252 states, 13082 states have (on average 1.6372114355603118) internal successors, (21418), 13433 states have internal predecessors, (21418), 2122 states have call successors, (2122), 43 states have call predecessors, (2122), 47 states have return successors, (2129), 2122 states have call predecessors, (2129), 2121 states have call successors, (2129) [2021-11-20 06:09:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15252 states to 15252 states and 25669 transitions. [2021-11-20 06:09:31,356 INFO L78 Accepts]: Start accepts. Automaton has 15252 states and 25669 transitions. Word has length 183 [2021-11-20 06:09:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:31,357 INFO L470 AbstractCegarLoop]: Abstraction has 15252 states and 25669 transitions. [2021-11-20 06:09:31,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 15252 states and 25669 transitions. [2021-11-20 06:09:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 06:09:31,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:31,417 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:31,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:09:31,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1500766331, now seen corresponding path program 1 times [2021-11-20 06:09:31,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:31,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347309434] [2021-11-20 06:09:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:31,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 06:09:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 06:09:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 06:09:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-20 06:09:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-20 06:09:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-20 06:09:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347309434] [2021-11-20 06:09:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347309434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:31,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:31,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:31,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637592058] [2021-11-20 06:09:31,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:31,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:31,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:31,600 INFO L87 Difference]: Start difference. First operand 15252 states and 25669 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:34,095 INFO L93 Difference]: Finished difference Result 36869 states and 62014 transitions. [2021-11-20 06:09:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:34,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 184 [2021-11-20 06:09:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:34,218 INFO L225 Difference]: With dead ends: 36869 [2021-11-20 06:09:34,218 INFO L226 Difference]: Without dead ends: 24261 [2021-11-20 06:09:34,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:34,259 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 1535 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:34,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1561 Valid, 1941 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:09:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24261 states. [2021-11-20 06:09:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24261 to 24121. [2021-11-20 06:09:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24121 states, 20748 states have (on average 1.619770580296896) internal successors, (33607), 21373 states have internal predecessors, (33607), 3325 states have call successors, (3325), 43 states have call predecessors, (3325), 47 states have return successors, (3332), 3325 states have call predecessors, (3332), 3324 states have call successors, (3332) [2021-11-20 06:09:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24121 states to 24121 states and 40264 transitions. [2021-11-20 06:09:35,892 INFO L78 Accepts]: Start accepts. Automaton has 24121 states and 40264 transitions. Word has length 184 [2021-11-20 06:09:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:35,893 INFO L470 AbstractCegarLoop]: Abstraction has 24121 states and 40264 transitions. [2021-11-20 06:09:35,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 24121 states and 40264 transitions. [2021-11-20 06:09:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:09:35,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:35,975 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:35,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:09:35,976 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1673482854, now seen corresponding path program 1 times [2021-11-20 06:09:35,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:35,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158350150] [2021-11-20 06:09:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:35,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-20 06:09:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 06:09:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-20 06:09:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-20 06:09:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 06:09:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2021-11-20 06:09:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:36,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:36,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158350150] [2021-11-20 06:09:36,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158350150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:36,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:36,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:36,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039681490] [2021-11-20 06:09:36,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:36,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:36,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:36,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:36,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:36,167 INFO L87 Difference]: Start difference. First operand 24121 states and 40264 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:39,169 INFO L93 Difference]: Finished difference Result 63722 states and 106674 transitions. [2021-11-20 06:09:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 185 [2021-11-20 06:09:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:39,360 INFO L225 Difference]: With dead ends: 63722 [2021-11-20 06:09:39,360 INFO L226 Difference]: Without dead ends: 43057 [2021-11-20 06:09:39,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:39,411 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 1505 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:39,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 1988 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 06:09:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43057 states. [2021-11-20 06:09:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43057 to 42917. [2021-11-20 06:09:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42917 states, 37094 states have (on average 1.6154634172642477) internal successors, (59924), 37985 states have internal predecessors, (59924), 5775 states have call successors, (5775), 43 states have call predecessors, (5775), 47 states have return successors, (5782), 5775 states have call predecessors, (5782), 5774 states have call successors, (5782) [2021-11-20 06:09:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42917 states to 42917 states and 71481 transitions. [2021-11-20 06:09:41,802 INFO L78 Accepts]: Start accepts. Automaton has 42917 states and 71481 transitions. Word has length 185 [2021-11-20 06:09:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:41,802 INFO L470 AbstractCegarLoop]: Abstraction has 42917 states and 71481 transitions. [2021-11-20 06:09:41,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 42917 states and 71481 transitions. [2021-11-20 06:09:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 06:09:42,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:42,131 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:42,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:09:42,131 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1784496728, now seen corresponding path program 1 times [2021-11-20 06:09:42,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:42,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376183854] [2021-11-20 06:09:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:42,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-20 06:09:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:09:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-20 06:09:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 06:09:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-20 06:09:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-20 06:09:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:42,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:42,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376183854] [2021-11-20 06:09:42,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376183854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:42,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:42,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:42,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628771106] [2021-11-20 06:09:42,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:42,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:42,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:42,317 INFO L87 Difference]: Start difference. First operand 42917 states and 71481 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:46,371 INFO L93 Difference]: Finished difference Result 116384 states and 194556 transitions. [2021-11-20 06:09:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:46,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 186 [2021-11-20 06:09:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:46,790 INFO L225 Difference]: With dead ends: 116384 [2021-11-20 06:09:46,791 INFO L226 Difference]: Without dead ends: 78099 [2021-11-20 06:09:46,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:46,882 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 1518 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:46,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 1965 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:09:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78099 states. [2021-11-20 06:09:49,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78099 to 77959. [2021-11-20 06:09:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77959 states, 67623 states have (on average 1.6143176138296143) internal successors, (109165), 69303 states have internal predecessors, (109165), 10288 states have call successors, (10288), 43 states have call predecessors, (10288), 47 states have return successors, (10295), 10288 states have call predecessors, (10295), 10287 states have call successors, (10295) [2021-11-20 06:09:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77959 states to 77959 states and 129748 transitions. [2021-11-20 06:09:50,442 INFO L78 Accepts]: Start accepts. Automaton has 77959 states and 129748 transitions. Word has length 186 [2021-11-20 06:09:50,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:50,443 INFO L470 AbstractCegarLoop]: Abstraction has 77959 states and 129748 transitions. [2021-11-20 06:09:50,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:50,443 INFO L276 IsEmpty]: Start isEmpty. Operand 77959 states and 129748 transitions. [2021-11-20 06:09:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-20 06:09:50,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:50,648 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:09:50,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:09:50,648 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:50,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1684715756, now seen corresponding path program 1 times [2021-11-20 06:09:50,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:50,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470219634] [2021-11-20 06:09:50,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:50,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:09:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:09:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:09:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:09:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:09:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:09:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:09:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:09:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:09:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:09:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:09:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:09:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-11-20 06:09:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 06:09:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 06:09:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-20 06:09:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 06:09:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-20 06:09:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:09:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-20 06:09:50,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470219634] [2021-11-20 06:09:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470219634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:50,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:50,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:09:50,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235985181] [2021-11-20 06:09:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:50,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:09:50,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:09:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:50,861 INFO L87 Difference]: Start difference. First operand 77959 states and 129748 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:09:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:56,571 INFO L93 Difference]: Finished difference Result 145849 states and 242711 transitions. [2021-11-20 06:09:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:09:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 187 [2021-11-20 06:09:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:57,073 INFO L225 Difference]: With dead ends: 145849 [2021-11-20 06:09:57,073 INFO L226 Difference]: Without dead ends: 145524 [2021-11-20 06:09:57,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:09:57,130 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 1513 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:57,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1540 Valid, 2006 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 06:09:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145524 states. [2021-11-20 06:10:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145524 to 145384. [2021-11-20 06:10:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145384 states, 126680 states have (on average 1.6072544995263656) internal successors, (203607), 128883 states have internal predecessors, (203607), 18656 states have call successors, (18656), 43 states have call predecessors, (18656), 47 states have return successors, (18663), 18656 states have call predecessors, (18663), 18655 states have call successors, (18663) [2021-11-20 06:10:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145384 states to 145384 states and 240926 transitions. [2021-11-20 06:10:03,494 INFO L78 Accepts]: Start accepts. Automaton has 145384 states and 240926 transitions. Word has length 187 [2021-11-20 06:10:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:03,495 INFO L470 AbstractCegarLoop]: Abstraction has 145384 states and 240926 transitions. [2021-11-20 06:10:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (29), 5 states have call predecessors, (29), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 06:10:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 145384 states and 240926 transitions. [2021-11-20 06:10:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-20 06:10:03,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:03,731 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:10:03,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:10:03,731 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__ForwardErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1024031312, now seen corresponding path program 1 times [2021-11-20 06:10:03,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:03,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409330602] [2021-11-20 06:10:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:03,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-20 06:10:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:10:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:10:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:10:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:10:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:10:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:10:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:03,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:10:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 06:10:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:10:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-20 06:10:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:10:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:10:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:10:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-20 06:10:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 06:10:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-20 06:10:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 06:10:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-11-20 06:10:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-20 06:10:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:10:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 06:10:04,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:04,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409330602] [2021-11-20 06:10:04,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409330602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:10:04,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837539417] [2021-11-20 06:10:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:04,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:04,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:04,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b6c194-5be2-4716-97c7-786bb3e7e015/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:10:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:04,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:10:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-11-20 06:10:05,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:05,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837539417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:05,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:10:05,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [27] total 44 [2021-11-20 06:10:05,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036159937] [2021-11-20 06:10:05,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:05,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:10:05,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:10:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:10:05,573 INFO L87 Difference]: Start difference. First operand 145384 states and 240926 transitions. Second operand has 19 states, 18 states have (on average 6.722222222222222) internal successors, (121), 14 states have internal predecessors, (121), 9 states have call successors, (29), 8 states have call predecessors, (29), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-11-20 06:10:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:11,191 INFO L93 Difference]: Finished difference Result 146209 states and 242131 transitions. [2021-11-20 06:10:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:10:11,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.722222222222222) internal successors, (121), 14 states have internal predecessors, (121), 9 states have call successors, (29), 8 states have call predecessors, (29), 6 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 188 [2021-11-20 06:10:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:11,935 INFO L225 Difference]: With dead ends: 146209 [2021-11-20 06:10:11,935 INFO L226 Difference]: Without dead ends: 145892 [2021-11-20 06:10:12,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=354, Invalid=4202, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:10:12,002 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1726 mSDsluCounter, 15516 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 16541 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:12,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1736 Valid, 16541 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:10:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145892 states.