./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y --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 bf462270e0c7c70d13b1dd17e19a66c26542ea365ec57459489c94e9a63941a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:57:02,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:57:02,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:57:03,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:57:03,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:57:03,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:57:03,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:57:03,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:57:03,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:57:03,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:57:03,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:57:03,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:57:03,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:57:03,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:57:03,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:57:03,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:57:03,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:57:03,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:57:03,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:57:03,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:57:03,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:57:03,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:57:03,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:57:03,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:57:03,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:57:03,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:57:03,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:57:03,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:57:03,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:57:03,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:57:03,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:57:03,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:57:03,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:57:03,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:57:03,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:57:03,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:57:03,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:57:03,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:57:03,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:57:03,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:57:03,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:57:03,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:57:03,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:57:03,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:57:03,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:57:03,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:57:03,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:57:03,247 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:57:03,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:57:03,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:57:03,248 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:57:03,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:57:03,250 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:57:03,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:57:03,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:57:03,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:57:03,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:57:03,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:57:03,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:57:03,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:57:03,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:57:03,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:57:03,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:57:03,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:57:03,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:57:03,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:57:03,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:57:03,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:57:03,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:57:03,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:57:03,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:57:03,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:57:03,258 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:57:03,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:57:03,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:57:03,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:57:03,259 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_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf462270e0c7c70d13b1dd17e19a66c26542ea365ec57459489c94e9a63941a0 [2021-11-13 17:57:03,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:57:03,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:57:03,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:57:03,641 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:57:03,642 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:57:03,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/product-lines/email_spec4_product18.cil.c [2021-11-13 17:57:03,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/data/e7b3b92f7/2d7a004e9dd44ab3ab2fc01a1e45d610/FLAGc998b1e4a [2021-11-13 17:57:04,638 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:57:04,643 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/sv-benchmarks/c/product-lines/email_spec4_product18.cil.c [2021-11-13 17:57:04,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/data/e7b3b92f7/2d7a004e9dd44ab3ab2fc01a1e45d610/FLAGc998b1e4a [2021-11-13 17:57:04,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/data/e7b3b92f7/2d7a004e9dd44ab3ab2fc01a1e45d610 [2021-11-13 17:57:04,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:57:04,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:57:04,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:57:04,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:57:04,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:57:04,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:57:04" (1/1) ... [2021-11-13 17:57:04,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6367a22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:04, skipping insertion in model container [2021-11-13 17:57:04,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:57:04" (1/1) ... [2021-11-13 17:57:04,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:57:04,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:57:05,582 WARN L228 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_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/sv-benchmarks/c/product-lines/email_spec4_product18.cil.c[61907,61920] [2021-11-13 17:57:05,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:57:05,600 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:57:05,786 WARN L228 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_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/sv-benchmarks/c/product-lines/email_spec4_product18.cil.c[61907,61920] [2021-11-13 17:57:05,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:57:05,832 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:57:05,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05 WrapperNode [2021-11-13 17:57:05,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:57:05,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:57:05,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:57:05,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:57:05,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:05,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:05,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:57:05,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:57:05,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:57:05,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:57:05,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:05,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:05,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:05,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:06,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:06,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:06,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:06,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:57:06,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:57:06,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:57:06,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:57:06,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (1/1) ... [2021-11-13 17:57:06,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:57:06,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:06,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:57:06,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:57:06,199 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-13 17:57:06,200 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-13 17:57:06,200 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-13 17:57:06,200 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-13 17:57:06,200 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-13 17:57:06,201 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-13 17:57:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-13 17:57:06,203 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-13 17:57:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-13 17:57:06,203 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-13 17:57:06,204 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-13 17:57:06,204 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-13 17:57:06,204 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-13 17:57:06,204 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-13 17:57:06,204 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-13 17:57:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-13 17:57:06,205 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-13 17:57:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-13 17:57:06,205 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-13 17:57:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-13 17:57:06,206 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-13 17:57:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:57:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-13 17:57:06,206 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-13 17:57:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-13 17:57:06,207 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-13 17:57:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-13 17:57:06,207 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-13 17:57:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-13 17:57:06,207 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-13 17:57:06,208 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-13 17:57:06,208 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-13 17:57:06,208 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-13 17:57:06,208 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-13 17:57:06,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:57:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-13 17:57:06,209 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-13 17:57:06,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:57:06,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:57:08,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:57:08,297 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:57:08,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:57:08 BoogieIcfgContainer [2021-11-13 17:57:08,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:57:08,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:57:08,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:57:08,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:57:08,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:57:04" (1/3) ... [2021-11-13 17:57:08,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddf04c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:57:08, skipping insertion in model container [2021-11-13 17:57:08,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:57:05" (2/3) ... [2021-11-13 17:57:08,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ddf04c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:57:08, skipping insertion in model container [2021-11-13 17:57:08,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:57:08" (3/3) ... [2021-11-13 17:57:08,312 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product18.cil.c [2021-11-13 17:57:08,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:57:08,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:57:08,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:57:08,421 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 [2021-11-13 17:57:08,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:57:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 232 states have (on average 1.543103448275862) internal successors, (358), 234 states have internal predecessors, (358), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-13 17:57:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 17:57:08,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:08,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-13 17:57:08,508 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1024121513, now seen corresponding path program 1 times [2021-11-13 17:57:08,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:08,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816712411] [2021-11-13 17:57:08,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:08,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:57:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 17:57:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:57:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 17:57:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-13 17:57:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 17:57:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:57:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 17:57:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:57:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 17:57:09,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:09,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816712411] [2021-11-13 17:57:09,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816712411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87684576] [2021-11-13 17:57:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:09,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:09,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:09,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:09,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:57:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 17:57:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 17:57:10,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:10,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87684576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:10,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:10,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [9] total 9 [2021-11-13 17:57:10,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671691514] [2021-11-13 17:57:10,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:10,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:57:10,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:10,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:57:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:57:10,269 INFO L87 Difference]: Start difference. First operand has 291 states, 232 states have (on average 1.543103448275862) internal successors, (358), 234 states have internal predecessors, (358), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:10,397 INFO L93 Difference]: Finished difference Result 428 states and 630 transitions. [2021-11-13 17:57:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:57:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2021-11-13 17:57:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:10,431 INFO L225 Difference]: With dead ends: 428 [2021-11-13 17:57:10,431 INFO L226 Difference]: Without dead ends: 284 [2021-11-13 17:57:10,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:57:10,455 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:10,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 11.63ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:57:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-13 17:57:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2021-11-13 17:57:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 226 states have (on average 1.5353982300884956) internal successors, (347), 227 states have internal predecessors, (347), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 17:57:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 426 transitions. [2021-11-13 17:57:10,595 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 426 transitions. Word has length 92 [2021-11-13 17:57:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:10,599 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 426 transitions. [2021-11-13 17:57:10,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 426 transitions. [2021-11-13 17:57:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 17:57:10,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:10,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-13 17:57:10,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:10,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-13 17:57:10,851 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2075349837, now seen corresponding path program 1 times [2021-11-13 17:57:10,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:10,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955479686] [2021-11-13 17:57:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:10,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:57:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 17:57:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:57:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 17:57:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:57:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 17:57:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 17:57:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 17:57:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 17:57:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 17:57:11,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:11,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955479686] [2021-11-13 17:57:11,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955479686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:11,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052266472] [2021-11-13 17:57:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:11,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:11,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:11,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:57:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:57:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 17:57:11,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:11,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052266472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:11,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:11,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-13 17:57:11,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001057110] [2021-11-13 17:57:11,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:11,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:57:11,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:57:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:57:11,879 INFO L87 Difference]: Start difference. First operand 284 states and 426 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:11,923 INFO L93 Difference]: Finished difference Result 418 states and 611 transitions. [2021-11-13 17:57:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:57:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 93 [2021-11-13 17:57:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:11,940 INFO L225 Difference]: With dead ends: 418 [2021-11-13 17:57:11,940 INFO L226 Difference]: Without dead ends: 287 [2021-11-13 17:57:11,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:57:11,945 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 1 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.37ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:11,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 846 Invalid, 5 Unknown, 0 Unchecked, 6.95ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 6.37ms Time] [2021-11-13 17:57:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-13 17:57:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2021-11-13 17:57:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 228 states have (on average 1.530701754385965) internal successors, (349), 229 states have internal predecessors, (349), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 17:57:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 428 transitions. [2021-11-13 17:57:11,984 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 428 transitions. Word has length 93 [2021-11-13 17:57:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:11,987 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 428 transitions. [2021-11-13 17:57:11,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 428 transitions. [2021-11-13 17:57:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 17:57:11,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:11,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:12,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:12,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:12,213 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1689423486, now seen corresponding path program 1 times [2021-11-13 17:57:12,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:12,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104830223] [2021-11-13 17:57:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:12,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:57:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 17:57:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:57:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 17:57:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 17:57:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:57:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 17:57:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 17:57:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 17:57:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 17:57:12,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:12,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104830223] [2021-11-13 17:57:12,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104830223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:12,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205522796] [2021-11-13 17:57:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:12,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:12,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:12,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:12,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:57:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:57:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 17:57:13,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:13,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205522796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:13,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:13,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-13 17:57:13,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597369205] [2021-11-13 17:57:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:13,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:57:13,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:57:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:57:13,134 INFO L87 Difference]: Start difference. First operand 286 states and 428 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:13,191 INFO L93 Difference]: Finished difference Result 602 states and 915 transitions. [2021-11-13 17:57:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:57:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 102 [2021-11-13 17:57:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:13,199 INFO L225 Difference]: With dead ends: 602 [2021-11-13 17:57:13,199 INFO L226 Difference]: Without dead ends: 343 [2021-11-13 17:57:13,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:57:13,205 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 107 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.73ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:13,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 821 Invalid, 4 Unknown, 0 Unchecked, 6.15ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 12.73ms Time] [2021-11-13 17:57:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-13 17:57:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 335. [2021-11-13 17:57:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 266 states have (on average 1.5451127819548873) internal successors, (411), 267 states have internal predecessors, (411), 51 states have call successors, (51), 17 states have call predecessors, (51), 17 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-13 17:57:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 512 transitions. [2021-11-13 17:57:13,254 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 512 transitions. Word has length 102 [2021-11-13 17:57:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:13,256 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 512 transitions. [2021-11-13 17:57:13,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 512 transitions. [2021-11-13 17:57:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 17:57:13,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:13,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:13,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:13,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:13,499 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:13,499 INFO L85 PathProgramCache]: Analyzing trace with hash 406530022, now seen corresponding path program 1 times [2021-11-13 17:57:13,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:13,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149367712] [2021-11-13 17:57:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:13,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 17:57:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 17:57:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:57:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 17:57:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:57:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 17:57:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:57:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:57:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:57:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 17:57:13,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:13,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149367712] [2021-11-13 17:57:13,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149367712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:13,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708268789] [2021-11-13 17:57:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:13,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:13,755 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:13,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:57:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:14,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:57:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:57:14,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:14,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708268789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:14,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:14,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-13 17:57:14,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826819477] [2021-11-13 17:57:14,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:14,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:57:14,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:57:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:57:14,470 INFO L87 Difference]: Start difference. First operand 335 states and 512 transitions. Second operand has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:14,584 INFO L93 Difference]: Finished difference Result 661 states and 1014 transitions. [2021-11-13 17:57:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:57:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 103 [2021-11-13 17:57:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:14,592 INFO L225 Difference]: With dead ends: 661 [2021-11-13 17:57:14,592 INFO L226 Difference]: Without dead ends: 337 [2021-11-13 17:57:14,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:14,596 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 125 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.11ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.35ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:14,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1524 Invalid, 34 Unknown, 0 Unchecked, 12.11ms Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 34.35ms Time] [2021-11-13 17:57:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-13 17:57:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2021-11-13 17:57:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 267 states have (on average 1.5430711610486891) internal successors, (412), 269 states have internal predecessors, (412), 51 states have call successors, (51), 17 states have call predecessors, (51), 18 states have return successors, (52), 50 states have call predecessors, (52), 50 states have call successors, (52) [2021-11-13 17:57:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 515 transitions. [2021-11-13 17:57:14,636 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 515 transitions. Word has length 103 [2021-11-13 17:57:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:14,637 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 515 transitions. [2021-11-13 17:57:14,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.75) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 515 transitions. [2021-11-13 17:57:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 17:57:14,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:14,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:14,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:14,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-13 17:57:14,858 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:14,859 INFO L85 PathProgramCache]: Analyzing trace with hash 33479798, now seen corresponding path program 1 times [2021-11-13 17:57:14,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:14,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356003465] [2021-11-13 17:57:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:14,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:14,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:14,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 17:57:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:57:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 17:57:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 17:57:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 17:57:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 17:57:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:57:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 17:57:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:57:15,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:15,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356003465] [2021-11-13 17:57:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356003465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:15,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078991881] [2021-11-13 17:57:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:15,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:15,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:15,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:57:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:57:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:57:15,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:15,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078991881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:15,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:15,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2021-11-13 17:57:15,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328561338] [2021-11-13 17:57:15,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:57:15,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:57:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:57:15,808 INFO L87 Difference]: Start difference. First operand 337 states and 515 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:15,915 INFO L93 Difference]: Finished difference Result 663 states and 1019 transitions. [2021-11-13 17:57:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:57:15,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 104 [2021-11-13 17:57:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:15,920 INFO L225 Difference]: With dead ends: 663 [2021-11-13 17:57:15,920 INFO L226 Difference]: Without dead ends: 339 [2021-11-13 17:57:15,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-13 17:57:15,923 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 124 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.95ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:15,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 1513 Invalid, 45 Unknown, 0 Unchecked, 7.16ms Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 55.95ms Time] [2021-11-13 17:57:15,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-13 17:57:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-11-13 17:57:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.541044776119403) internal successors, (413), 271 states have internal predecessors, (413), 51 states have call successors, (51), 17 states have call predecessors, (51), 19 states have return successors, (57), 50 states have call predecessors, (57), 50 states have call successors, (57) [2021-11-13 17:57:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 521 transitions. [2021-11-13 17:57:15,949 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 521 transitions. Word has length 104 [2021-11-13 17:57:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:15,950 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 521 transitions. [2021-11-13 17:57:15,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 521 transitions. [2021-11-13 17:57:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 17:57:15,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:15,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:15,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:16,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:16,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:16,167 INFO L85 PathProgramCache]: Analyzing trace with hash -851300096, now seen corresponding path program 1 times [2021-11-13 17:57:16,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:16,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204270478] [2021-11-13 17:57:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:16,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-13 17:57:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-13 17:57:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 17:57:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-13 17:57:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:57:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 17:57:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 17:57:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 17:57:16,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:16,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204270478] [2021-11-13 17:57:16,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204270478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:16,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770397040] [2021-11-13 17:57:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:16,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:16,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:16,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:57:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:16,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 17:57:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 17:57:17,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:17,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770397040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:17,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:17,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-13 17:57:17,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954154937] [2021-11-13 17:57:17,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:17,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:57:17,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:57:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:57:17,060 INFO L87 Difference]: Start difference. First operand 339 states and 521 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:17,146 INFO L93 Difference]: Finished difference Result 655 states and 1010 transitions. [2021-11-13 17:57:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:57:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 105 [2021-11-13 17:57:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:17,152 INFO L225 Difference]: With dead ends: 655 [2021-11-13 17:57:17,152 INFO L226 Difference]: Without dead ends: 339 [2021-11-13 17:57:17,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:57:17,156 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 123 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:17,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1527 Invalid, 35 Unknown, 0 Unchecked, 8.69ms Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 33.92ms Time] [2021-11-13 17:57:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-13 17:57:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-11-13 17:57:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.541044776119403) internal successors, (413), 271 states have internal predecessors, (413), 51 states have call successors, (51), 17 states have call predecessors, (51), 19 states have return successors, (56), 50 states have call predecessors, (56), 50 states have call successors, (56) [2021-11-13 17:57:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 520 transitions. [2021-11-13 17:57:17,213 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 520 transitions. Word has length 105 [2021-11-13 17:57:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:17,214 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 520 transitions. [2021-11-13 17:57:17,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 520 transitions. [2021-11-13 17:57:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 17:57:17,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:17,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:17,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:17,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:17,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 855567918, now seen corresponding path program 2 times [2021-11-13 17:57:17,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:17,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902430743] [2021-11-13 17:57:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:17,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:57:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-13 17:57:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 17:57:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:57:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 17:57:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 17:57:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:57:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:57:17,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:17,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902430743] [2021-11-13 17:57:17,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902430743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:17,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:17,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 17:57:17,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960571005] [2021-11-13 17:57:17,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:17,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:57:17,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:17,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:57:17,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:17,698 INFO L87 Difference]: Start difference. First operand 339 states and 520 transitions. Second operand has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 17:57:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:21,397 INFO L93 Difference]: Finished difference Result 776 states and 1194 transitions. [2021-11-13 17:57:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:57:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) Word has length 106 [2021-11-13 17:57:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:21,404 INFO L225 Difference]: With dead ends: 776 [2021-11-13 17:57:21,404 INFO L226 Difference]: Without dead ends: 448 [2021-11-13 17:57:21,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-11-13 17:57:21,415 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 1235 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 2910 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2566.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.39ms SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3121.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:21,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1941 Invalid, 3285 Unknown, 0 Unchecked, 58.39ms Time], IncrementalHoareTripleChecker [375 Valid, 2910 Invalid, 0 Unknown, 0 Unchecked, 3121.00ms Time] [2021-11-13 17:57:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-13 17:57:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 344. [2021-11-13 17:57:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 272 states have (on average 1.5330882352941178) internal successors, (417), 275 states have internal predecessors, (417), 51 states have call successors, (51), 18 states have call predecessors, (51), 20 states have return successors, (57), 50 states have call predecessors, (57), 50 states have call successors, (57) [2021-11-13 17:57:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 525 transitions. [2021-11-13 17:57:21,487 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 525 transitions. Word has length 106 [2021-11-13 17:57:21,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:21,489 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 525 transitions. [2021-11-13 17:57:21,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 9 states have internal predecessors, (69), 5 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 17:57:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 525 transitions. [2021-11-13 17:57:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 17:57:21,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:21,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:21,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:57:21,495 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash -802988394, now seen corresponding path program 3 times [2021-11-13 17:57:21,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:21,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269773307] [2021-11-13 17:57:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:21,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:57:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 17:57:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 17:57:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 17:57:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 17:57:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 17:57:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 17:57:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 17:57:21,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:21,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269773307] [2021-11-13 17:57:21,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269773307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:21,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816585221] [2021-11-13 17:57:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:57:21,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:21,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:21,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:21,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:57:22,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 17:57:22,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:57:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:57:22,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-13 17:57:22,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816585221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:22,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:22,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-13 17:57:22,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696834875] [2021-11-13 17:57:22,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:57:22,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:57:22,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:57:22,913 INFO L87 Difference]: Start difference. First operand 344 states and 525 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:23,023 INFO L93 Difference]: Finished difference Result 660 states and 1017 transitions. [2021-11-13 17:57:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:57:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 107 [2021-11-13 17:57:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:23,028 INFO L225 Difference]: With dead ends: 660 [2021-11-13 17:57:23,028 INFO L226 Difference]: Without dead ends: 346 [2021-11-13 17:57:23,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:57:23,032 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 121 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:23,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 1516 Invalid, 46 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 46.09ms Time] [2021-11-13 17:57:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-13 17:57:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-11-13 17:57:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.531135531135531) internal successors, (418), 277 states have internal predecessors, (418), 51 states have call successors, (51), 18 states have call predecessors, (51), 21 states have return successors, (62), 50 states have call predecessors, (62), 50 states have call successors, (62) [2021-11-13 17:57:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 531 transitions. [2021-11-13 17:57:23,075 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 531 transitions. Word has length 107 [2021-11-13 17:57:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:23,076 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 531 transitions. [2021-11-13 17:57:23,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 17:57:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 531 transitions. [2021-11-13 17:57:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 17:57:23,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:23,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:23,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:23,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 17:57:23,306 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1548374835, now seen corresponding path program 1 times [2021-11-13 17:57:23,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:23,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933705829] [2021-11-13 17:57:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:23,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:57:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:57:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 17:57:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 17:57:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 17:57:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-13 17:57:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 17:57:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:57:23,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:23,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933705829] [2021-11-13 17:57:23,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933705829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:23,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:23,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 17:57:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955313998] [2021-11-13 17:57:23,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 17:57:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 17:57:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:57:23,599 INFO L87 Difference]: Start difference. First operand 346 states and 531 transitions. Second operand has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 17:57:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:26,981 INFO L93 Difference]: Finished difference Result 768 states and 1185 transitions. [2021-11-13 17:57:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:57:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 108 [2021-11-13 17:57:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:26,987 INFO L225 Difference]: With dead ends: 768 [2021-11-13 17:57:26,988 INFO L226 Difference]: Without dead ends: 450 [2021-11-13 17:57:26,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:57:26,992 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 1002 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2426.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.53ms SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2886.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:26,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1021 Valid, 2003 Invalid, 2903 Unknown, 0 Unchecked, 39.53ms Time], IncrementalHoareTripleChecker [311 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 2886.99ms Time] [2021-11-13 17:57:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-13 17:57:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 346. [2021-11-13 17:57:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 273 states have (on average 1.531135531135531) internal successors, (418), 277 states have internal predecessors, (418), 51 states have call successors, (51), 18 states have call predecessors, (51), 21 states have return successors, (61), 50 states have call predecessors, (61), 50 states have call successors, (61) [2021-11-13 17:57:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 530 transitions. [2021-11-13 17:57:27,059 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 530 transitions. Word has length 108 [2021-11-13 17:57:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:27,059 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 530 transitions. [2021-11-13 17:57:27,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.454545454545454) internal successors, (71), 8 states have internal predecessors, (71), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 17:57:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 530 transitions. [2021-11-13 17:57:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 17:57:27,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:27,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:27,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:57:27,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:27,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2042043830, now seen corresponding path program 1 times [2021-11-13 17:57:27,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:27,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613640132] [2021-11-13 17:57:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:27,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-13 17:57:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 17:57:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 17:57:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:57:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 17:57:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:57:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 17:57:27,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:27,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613640132] [2021-11-13 17:57:27,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613640132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:27,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657611453] [2021-11-13 17:57:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:27,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:27,290 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:27,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:57:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:57:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:27,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:57:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:28,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657611453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:57:28,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:57:28,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 15 [2021-11-13 17:57:28,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902261721] [2021-11-13 17:57:28,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:57:28,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:57:28,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:57:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:57:28,167 INFO L87 Difference]: Start difference. First operand 346 states and 530 transitions. Second operand has 15 states, 14 states have (on average 8.428571428571429) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (29), 6 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 17:57:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:34,204 INFO L93 Difference]: Finished difference Result 1443 states and 2405 transitions. [2021-11-13 17:57:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 17:57:34,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 8.428571428571429) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (29), 6 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 109 [2021-11-13 17:57:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:34,224 INFO L225 Difference]: With dead ends: 1443 [2021-11-13 17:57:34,225 INFO L226 Difference]: Without dead ends: 1131 [2021-11-13 17:57:34,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-11-13 17:57:34,231 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 2742 mSDsluCounter, 2748 mSDsCounter, 0 mSdLazyCounter, 3503 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4687.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2744 SdHoareTripleChecker+Valid, 3402 SdHoareTripleChecker+Invalid, 4493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.21ms SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 3503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5372.09ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:34,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2744 Valid, 3402 Invalid, 4493 Unknown, 0 Unchecked, 59.21ms Time], IncrementalHoareTripleChecker [990 Valid, 3503 Invalid, 0 Unknown, 0 Unchecked, 5372.09ms Time] [2021-11-13 17:57:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-13 17:57:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 674. [2021-11-13 17:57:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 537 states have (on average 1.5810055865921788) internal successors, (849), 541 states have internal predecessors, (849), 115 states have call successors, (115), 18 states have call predecessors, (115), 21 states have return successors, (135), 114 states have call predecessors, (135), 114 states have call successors, (135) [2021-11-13 17:57:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1099 transitions. [2021-11-13 17:57:34,370 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1099 transitions. Word has length 109 [2021-11-13 17:57:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:34,371 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1099 transitions. [2021-11-13 17:57:34,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 8.428571428571429) internal successors, (118), 11 states have internal predecessors, (118), 4 states have call successors, (29), 6 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2021-11-13 17:57:34,371 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1099 transitions. [2021-11-13 17:57:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 17:57:34,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:34,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:34,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:34,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dda41bd9-8fb7-4188-9c77-d1f8309ad96f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:34,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:34,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1028197055, now seen corresponding path program 1 times [2021-11-13 17:57:34,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:34,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571406817] [2021-11-13 17:57:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:34,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 17:57:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 17:57:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 17:57:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 17:57:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 17:57:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:57:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:34,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:34,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571406817] [2021-11-13 17:57:34,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571406817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:34,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:34,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:34,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219890260] [2021-11-13 17:57:34,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:34,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:34,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:34,770 INFO L87 Difference]: Start difference. First operand 674 states and 1099 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:36,745 INFO L93 Difference]: Finished difference Result 1679 states and 2808 transitions. [2021-11-13 17:57:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 112 [2021-11-13 17:57:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:36,757 INFO L225 Difference]: With dead ends: 1679 [2021-11-13 17:57:36,758 INFO L226 Difference]: Without dead ends: 1086 [2021-11-13 17:57:36,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:36,763 INFO L933 BasicCegarLoop]: 543 mSDtfsCounter, 997 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1471.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.10ms SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1729.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:36,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1282 Invalid, 1094 Unknown, 0 Unchecked, 15.10ms Time], IncrementalHoareTripleChecker [336 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 1729.55ms Time] [2021-11-13 17:57:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-13 17:57:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 974. [2021-11-13 17:57:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 773 states have (on average 1.5963777490297542) internal successors, (1234), 777 states have internal predecessors, (1234), 179 states have call successors, (179), 18 states have call predecessors, (179), 21 states have return successors, (209), 178 states have call predecessors, (209), 178 states have call successors, (209) [2021-11-13 17:57:36,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1622 transitions. [2021-11-13 17:57:36,875 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1622 transitions. Word has length 112 [2021-11-13 17:57:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:36,876 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1622 transitions. [2021-11-13 17:57:36,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1622 transitions. [2021-11-13 17:57:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 17:57:36,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:36,883 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:36,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:57:36,884 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 342356814, now seen corresponding path program 1 times [2021-11-13 17:57:36,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:36,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053914593] [2021-11-13 17:57:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:36,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:36,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 17:57:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:37,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 17:57:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:57:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:37,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 17:57:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:57:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:37,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 17:57:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:37,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:37,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053914593] [2021-11-13 17:57:37,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053914593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:37,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:37,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:37,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234207205] [2021-11-13 17:57:37,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:37,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:37,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:37,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:37,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:37,029 INFO L87 Difference]: Start difference. First operand 974 states and 1622 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:38,824 INFO L93 Difference]: Finished difference Result 2419 states and 4088 transitions. [2021-11-13 17:57:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-13 17:57:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:38,843 INFO L225 Difference]: With dead ends: 2419 [2021-11-13 17:57:38,843 INFO L226 Difference]: Without dead ends: 1579 [2021-11-13 17:57:38,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:38,851 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 996 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1265.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.25ms SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1514.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:38,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 1227 Invalid, 1078 Unknown, 0 Unchecked, 15.25ms Time], IncrementalHoareTripleChecker [340 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1514.77ms Time] [2021-11-13 17:57:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-13 17:57:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1467. [2021-11-13 17:57:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1171 states have (on average 1.6020495303159692) internal successors, (1876), 1175 states have internal predecessors, (1876), 274 states have call successors, (274), 18 states have call predecessors, (274), 21 states have return successors, (304), 273 states have call predecessors, (304), 273 states have call successors, (304) [2021-11-13 17:57:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2454 transitions. [2021-11-13 17:57:39,054 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2454 transitions. Word has length 113 [2021-11-13 17:57:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:39,054 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2454 transitions. [2021-11-13 17:57:39,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2454 transitions. [2021-11-13 17:57:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 17:57:39,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:39,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:39,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:57:39,066 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash 913875667, now seen corresponding path program 1 times [2021-11-13 17:57:39,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:39,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761916512] [2021-11-13 17:57:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:39,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 17:57:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-13 17:57:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 17:57:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-13 17:57:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 17:57:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 17:57:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:39,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:39,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761916512] [2021-11-13 17:57:39,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761916512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:39,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:39,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:39,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930516376] [2021-11-13 17:57:39,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:39,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:39,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:39,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:39,271 INFO L87 Difference]: Start difference. First operand 1467 states and 2454 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:41,644 INFO L93 Difference]: Finished difference Result 3521 states and 6006 transitions. [2021-11-13 17:57:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:41,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 114 [2021-11-13 17:57:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:41,673 INFO L225 Difference]: With dead ends: 3521 [2021-11-13 17:57:41,673 INFO L226 Difference]: Without dead ends: 2323 [2021-11-13 17:57:41,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:41,683 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 993 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1694.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.60ms SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1975.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:41,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 1237 Invalid, 1081 Unknown, 0 Unchecked, 16.60ms Time], IncrementalHoareTripleChecker [341 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 1975.12ms Time] [2021-11-13 17:57:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-11-13 17:57:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2211. [2021-11-13 17:57:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 1792 states have (on average 1.6065848214285714) internal successors, (2879), 1796 states have internal predecessors, (2879), 397 states have call successors, (397), 18 states have call predecessors, (397), 21 states have return successors, (443), 396 states have call predecessors, (443), 396 states have call successors, (443) [2021-11-13 17:57:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 3719 transitions. [2021-11-13 17:57:41,970 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 3719 transitions. Word has length 114 [2021-11-13 17:57:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:41,971 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 3719 transitions. [2021-11-13 17:57:41,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 3719 transitions. [2021-11-13 17:57:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 17:57:41,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:41,987 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:41,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:57:41,987 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1746348205, now seen corresponding path program 1 times [2021-11-13 17:57:41,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:41,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756091812] [2021-11-13 17:57:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:41,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 17:57:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:57:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 17:57:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 17:57:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 17:57:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:57:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:42,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:42,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756091812] [2021-11-13 17:57:42,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756091812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:42,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:42,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:42,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785828221] [2021-11-13 17:57:42,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:42,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:42,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:42,144 INFO L87 Difference]: Start difference. First operand 2211 states and 3719 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:44,022 INFO L93 Difference]: Finished difference Result 5230 states and 8986 transitions. [2021-11-13 17:57:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 115 [2021-11-13 17:57:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:44,060 INFO L225 Difference]: With dead ends: 5230 [2021-11-13 17:57:44,060 INFO L226 Difference]: Without dead ends: 3507 [2021-11-13 17:57:44,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:44,070 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 992 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1282.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.11ms SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1545.62ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:44,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 1221 Invalid, 1066 Unknown, 0 Unchecked, 12.11ms Time], IncrementalHoareTripleChecker [341 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1545.62ms Time] [2021-11-13 17:57:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-11-13 17:57:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3395. [2021-11-13 17:57:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 2797 states have (on average 1.6092241687522346) internal successors, (4501), 2801 states have internal predecessors, (4501), 576 states have call successors, (576), 18 states have call predecessors, (576), 21 states have return successors, (648), 575 states have call predecessors, (648), 575 states have call successors, (648) [2021-11-13 17:57:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5725 transitions. [2021-11-13 17:57:44,528 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5725 transitions. Word has length 115 [2021-11-13 17:57:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 3395 states and 5725 transitions. [2021-11-13 17:57:44,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5725 transitions. [2021-11-13 17:57:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 17:57:44,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:44,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:44,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:57:44,544 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:44,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:44,545 INFO L85 PathProgramCache]: Analyzing trace with hash 81862775, now seen corresponding path program 1 times [2021-11-13 17:57:44,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:44,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838281488] [2021-11-13 17:57:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:44,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:57:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 17:57:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 17:57:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-13 17:57:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:57:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-13 17:57:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:44,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:44,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838281488] [2021-11-13 17:57:44,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838281488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:44,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:44,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:44,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264275399] [2021-11-13 17:57:44,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:44,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:44,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:44,721 INFO L87 Difference]: Start difference. First operand 3395 states and 5725 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:46,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:46,822 INFO L93 Difference]: Finished difference Result 8303 states and 14302 transitions. [2021-11-13 17:57:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 17:57:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:46,884 INFO L225 Difference]: With dead ends: 8303 [2021-11-13 17:57:46,884 INFO L226 Difference]: Without dead ends: 5648 [2021-11-13 17:57:46,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:46,901 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 990 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1343.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.48ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1621.24ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:46,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1261 Invalid, 1094 Unknown, 0 Unchecked, 12.48ms Time], IncrementalHoareTripleChecker [349 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1621.24ms Time] [2021-11-13 17:57:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-11-13 17:57:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5536. [2021-11-13 17:57:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5536 states, 4562 states have (on average 1.6017097764138535) internal successors, (7307), 4566 states have internal predecessors, (7307), 952 states have call successors, (952), 18 states have call predecessors, (952), 21 states have return successors, (1068), 951 states have call predecessors, (1068), 951 states have call successors, (1068) [2021-11-13 17:57:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5536 states to 5536 states and 9327 transitions. [2021-11-13 17:57:47,578 INFO L78 Accepts]: Start accepts. Automaton has 5536 states and 9327 transitions. Word has length 116 [2021-11-13 17:57:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:47,579 INFO L470 AbstractCegarLoop]: Abstraction has 5536 states and 9327 transitions. [2021-11-13 17:57:47,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5536 states and 9327 transitions. [2021-11-13 17:57:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 17:57:47,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:47,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:47,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:57:47,602 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash -448101623, now seen corresponding path program 1 times [2021-11-13 17:57:47,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:47,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858177344] [2021-11-13 17:57:47,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:47,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 17:57:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 17:57:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 17:57:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 17:57:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 17:57:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 17:57:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:47,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:47,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858177344] [2021-11-13 17:57:47,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858177344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:47,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:47,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:47,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217835067] [2021-11-13 17:57:47,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:47,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:47,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:47,764 INFO L87 Difference]: Start difference. First operand 5536 states and 9327 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:50,431 INFO L93 Difference]: Finished difference Result 13725 states and 23603 transitions. [2021-11-13 17:57:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:50,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2021-11-13 17:57:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:50,504 INFO L225 Difference]: With dead ends: 13725 [2021-11-13 17:57:50,504 INFO L226 Difference]: Without dead ends: 9331 [2021-11-13 17:57:50,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:50,527 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 987 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1593.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.23ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1898.25ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:50,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 1241 Invalid, 1091 Unknown, 0 Unchecked, 15.23ms Time], IncrementalHoareTripleChecker [349 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1898.25ms Time] [2021-11-13 17:57:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2021-11-13 17:57:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 9219. [2021-11-13 17:57:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9219 states, 7639 states have (on average 1.5989003796308416) internal successors, (12214), 7643 states have internal predecessors, (12214), 1558 states have call successors, (1558), 18 states have call predecessors, (1558), 21 states have return successors, (1752), 1557 states have call predecessors, (1752), 1557 states have call successors, (1752) [2021-11-13 17:57:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9219 states to 9219 states and 15524 transitions. [2021-11-13 17:57:51,436 INFO L78 Accepts]: Start accepts. Automaton has 9219 states and 15524 transitions. Word has length 117 [2021-11-13 17:57:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:51,437 INFO L470 AbstractCegarLoop]: Abstraction has 9219 states and 15524 transitions. [2021-11-13 17:57:51,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 9219 states and 15524 transitions. [2021-11-13 17:57:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-13 17:57:51,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:51,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:51,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:57:51,538 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1807777429, now seen corresponding path program 1 times [2021-11-13 17:57:51,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:51,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891877273] [2021-11-13 17:57:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:51,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 17:57:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-13 17:57:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 17:57:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 17:57:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 17:57:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-13 17:57:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:51,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:51,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891877273] [2021-11-13 17:57:51,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891877273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:51,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:51,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:51,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145628958] [2021-11-13 17:57:51,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:51,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:51,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:51,684 INFO L87 Difference]: Start difference. First operand 9219 states and 15524 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:54,490 INFO L93 Difference]: Finished difference Result 23909 states and 41044 transitions. [2021-11-13 17:57:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-11-13 17:57:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:54,589 INFO L225 Difference]: With dead ends: 23909 [2021-11-13 17:57:54,590 INFO L226 Difference]: Without dead ends: 16284 [2021-11-13 17:57:54,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:57:54,634 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 985 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1493.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.96ms SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1726.29ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:54,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1000 Valid, 1264 Invalid, 1097 Unknown, 0 Unchecked, 11.96ms Time], IncrementalHoareTripleChecker [345 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 1726.29ms Time] [2021-11-13 17:57:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16284 states. [2021-11-13 17:57:56,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16284 to 16172. [2021-11-13 17:57:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16172 states, 13389 states have (on average 1.5896631563223542) internal successors, (21284), 13393 states have internal predecessors, (21284), 2761 states have call successors, (2761), 18 states have call predecessors, (2761), 21 states have return successors, (3099), 2760 states have call predecessors, (3099), 2760 states have call successors, (3099) [2021-11-13 17:57:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16172 states to 16172 states and 27144 transitions. [2021-11-13 17:57:56,136 INFO L78 Accepts]: Start accepts. Automaton has 16172 states and 27144 transitions. Word has length 118 [2021-11-13 17:57:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:56,137 INFO L470 AbstractCegarLoop]: Abstraction has 16172 states and 27144 transitions. [2021-11-13 17:57:56,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 16172 states and 27144 transitions. [2021-11-13 17:57:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 17:57:56,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:56,190 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:56,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:57:56,190 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash 642347208, now seen corresponding path program 1 times [2021-11-13 17:57:56,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:56,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859023714] [2021-11-13 17:57:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:56,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:57:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:57:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:57:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:57:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:57:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:57:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-13 17:57:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 17:57:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 17:57:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 17:57:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 17:57:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 17:57:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:57:56,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:56,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859023714] [2021-11-13 17:57:56,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859023714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:56,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:56,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:56,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086516387] [2021-11-13 17:57:56,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:56,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:56,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:56,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:56,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:56,354 INFO L87 Difference]: Start difference. First operand 16172 states and 27144 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:00,088 INFO L93 Difference]: Finished difference Result 42875 states and 73441 transitions. [2021-11-13 17:58:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:58:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-11-13 17:58:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:00,265 INFO L225 Difference]: With dead ends: 42875 [2021-11-13 17:58:00,266 INFO L226 Difference]: Without dead ends: 28939 [2021-11-13 17:58:00,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:58:00,312 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 983 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1372.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.78ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1569.06ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:00,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1242 Invalid, 1097 Unknown, 0 Unchecked, 10.78ms Time], IncrementalHoareTripleChecker [349 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1569.06ms Time] [2021-11-13 17:58:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28939 states. [2021-11-13 17:58:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28939 to 28827. [2021-11-13 17:58:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28827 states, 24005 states have (on average 1.5851280983128515) internal successors, (38051), 24009 states have internal predecessors, (38051), 4800 states have call successors, (4800), 18 states have call predecessors, (4800), 21 states have return successors, (5412), 4799 states have call predecessors, (5412), 4799 states have call successors, (5412) [2021-11-13 17:58:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28827 states to 28827 states and 48263 transitions. [2021-11-13 17:58:02,772 INFO L78 Accepts]: Start accepts. Automaton has 28827 states and 48263 transitions. Word has length 119 [2021-11-13 17:58:02,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:02,773 INFO L470 AbstractCegarLoop]: Abstraction has 28827 states and 48263 transitions. [2021-11-13 17:58:02,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:02,773 INFO L276 IsEmpty]: Start isEmpty. Operand 28827 states and 48263 transitions. [2021-11-13 17:58:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 17:58:02,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:02,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:02,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:58:02,812 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:02,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1660997549, now seen corresponding path program 1 times [2021-11-13 17:58:02,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:02,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54317133] [2021-11-13 17:58:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:02,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:58:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:58:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:58:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:58:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:58:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:58:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 17:58:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 17:58:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:58:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 17:58:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 17:58:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-11-13 17:58:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:58:02,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:02,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54317133] [2021-11-13 17:58:02,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54317133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:58:02,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:58:02,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:58:02,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887775989] [2021-11-13 17:58:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:58:02,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:58:02,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:58:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:58:02,986 INFO L87 Difference]: Start difference. First operand 28827 states and 48263 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:08,205 INFO L93 Difference]: Finished difference Result 78637 states and 133805 transitions. [2021-11-13 17:58:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:58:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 120 [2021-11-13 17:58:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:08,541 INFO L225 Difference]: With dead ends: 78637 [2021-11-13 17:58:08,542 INFO L226 Difference]: Without dead ends: 52818 [2021-11-13 17:58:08,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:58:08,616 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 982 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1532.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.66ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1762.70ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:08,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 1240 Invalid, 1084 Unknown, 0 Unchecked, 11.66ms Time], IncrementalHoareTripleChecker [349 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1762.70ms Time] [2021-11-13 17:58:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52818 states. [2021-11-13 17:58:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52818 to 52706. [2021-11-13 17:58:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52706 states, 44169 states have (on average 1.5792524168534492) internal successors, (69754), 44173 states have internal predecessors, (69754), 8515 states have call successors, (8515), 18 states have call predecessors, (8515), 21 states have return successors, (9659), 8514 states have call predecessors, (9659), 8514 states have call successors, (9659) [2021-11-13 17:58:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52706 states to 52706 states and 87928 transitions. [2021-11-13 17:58:13,380 INFO L78 Accepts]: Start accepts. Automaton has 52706 states and 87928 transitions. Word has length 120 [2021-11-13 17:58:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:13,380 INFO L470 AbstractCegarLoop]: Abstraction has 52706 states and 87928 transitions. [2021-11-13 17:58:13,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 52706 states and 87928 transitions. [2021-11-13 17:58:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 17:58:13,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:13,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:13,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:58:13,423 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -884455480, now seen corresponding path program 1 times [2021-11-13 17:58:13,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:13,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963251894] [2021-11-13 17:58:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:13,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:58:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:58:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:58:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:58:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:58:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:58:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 17:58:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 17:58:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 17:58:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 17:58:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 17:58:13,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 17:58:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:58:13,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:13,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963251894] [2021-11-13 17:58:13,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963251894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:58:13,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:58:13,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:58:13,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821227806] [2021-11-13 17:58:13,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:58:13,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:58:13,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:13,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:58:13,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:58:13,607 INFO L87 Difference]: Start difference. First operand 52706 states and 87928 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:20,952 INFO L93 Difference]: Finished difference Result 98408 states and 167735 transitions. [2021-11-13 17:58:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:58:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 121 [2021-11-13 17:58:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:21,533 INFO L225 Difference]: With dead ends: 98408 [2021-11-13 17:58:21,534 INFO L226 Difference]: Without dead ends: 98277 [2021-11-13 17:58:21,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:58:21,579 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 980 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1264.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.15ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1482.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:21,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 1236 Invalid, 1090 Unknown, 0 Unchecked, 11.15ms Time], IncrementalHoareTripleChecker [349 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1482.08ms Time] [2021-11-13 17:58:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98277 states. [2021-11-13 17:58:28,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98277 to 98165. [2021-11-13 17:58:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98165 states, 82829 states have (on average 1.5719252918663753) internal successors, (130201), 82833 states have internal predecessors, (130201), 15314 states have call successors, (15314), 18 states have call predecessors, (15314), 21 states have return successors, (17504), 15313 states have call predecessors, (17504), 15313 states have call successors, (17504) [2021-11-13 17:58:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98165 states to 98165 states and 163019 transitions. [2021-11-13 17:58:29,250 INFO L78 Accepts]: Start accepts. Automaton has 98165 states and 163019 transitions. Word has length 121 [2021-11-13 17:58:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:29,251 INFO L470 AbstractCegarLoop]: Abstraction has 98165 states and 163019 transitions. [2021-11-13 17:58:29,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:29,251 INFO L276 IsEmpty]: Start isEmpty. Operand 98165 states and 163019 transitions. [2021-11-13 17:58:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 17:58:29,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:29,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:29,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:58:29,287 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:29,287 INFO L85 PathProgramCache]: Analyzing trace with hash -366796012, now seen corresponding path program 1 times [2021-11-13 17:58:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:29,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722490504] [2021-11-13 17:58:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:29,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:58:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 17:58:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:58:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-13 17:58:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 17:58:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-13 17:58:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 17:58:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:58:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-13 17:58:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 17:58:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:58:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 17:58:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 17:58:29,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:29,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722490504] [2021-11-13 17:58:29,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722490504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:58:29,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:58:29,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-13 17:58:29,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666255632] [2021-11-13 17:58:29,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:58:29,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 17:58:29,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:58:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 17:58:29,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:58:29,507 INFO L87 Difference]: Start difference. First operand 98165 states and 163019 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:58:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:38,780 INFO L93 Difference]: Finished difference Result 98851 states and 167327 transitions. [2021-11-13 17:58:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 17:58:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 5 states have internal predecessors, (80), 2 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 122 [2021-11-13 17:58:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:39,321 INFO L225 Difference]: With dead ends: 98851 [2021-11-13 17:58:39,321 INFO L226 Difference]: Without dead ends: 98728 [2021-11-13 17:58:39,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2021-11-13 17:58:39,356 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1772 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3456.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 3353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.62ms SdHoareTripleChecker+Time, 736 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3895.10ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:39,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1786 Valid, 1885 Invalid, 3353 Unknown, 0 Unchecked, 24.62ms Time], IncrementalHoareTripleChecker [736 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 3895.10ms Time] [2021-11-13 17:58:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98728 states.