./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:20:02,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:20:02,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:20:02,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:20:02,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:20:02,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:20:02,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:20:02,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:20:02,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:20:02,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:20:02,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:20:02,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:20:02,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:20:02,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:20:02,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:20:02,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:20:02,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:20:02,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:20:02,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:20:02,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:20:02,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:20:02,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:20:02,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:20:02,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:20:02,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:20:02,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:20:02,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:20:02,169 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:20:02,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:20:02,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:20:02,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:20:02,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:20:02,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:20:02,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:20:02,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:20:02,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:20:02,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:20:02,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:20:02,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:20:02,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:20:02,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:20:02,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:20:02,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:20:02,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:20:02,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:20:02,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:20:02,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:20:02,252 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:20:02,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:20:02,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:20:02,253 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:20:02,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:20:02,255 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:20:02,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:20:02,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:20:02,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:20:02,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:20:02,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:20:02,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:20:02,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:20:02,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:20:02,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:20:02,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:20:02,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:20:02,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:20:02,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:20:02,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:20:02,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:20:02,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:20:02,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:20:02,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:20:02,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:20:02,263 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:20:02,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:20:02,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:20:02,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:20:02,265 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_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4d752ef50871b3af82701ffcd8ca92c2975f63f8274731e1afbb137d2562986 [2021-11-20 06:20:02,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:20:02,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:20:02,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:20:02,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:20:02,597 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:20:02,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-20 06:20:02,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/data/a1b15d6f3/eb23295c202e41979c78b4fde59f31ff/FLAG88988af19 [2021-11-20 06:20:03,450 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:20:03,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c [2021-11-20 06:20:03,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/data/a1b15d6f3/eb23295c202e41979c78b4fde59f31ff/FLAG88988af19 [2021-11-20 06:20:03,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/data/a1b15d6f3/eb23295c202e41979c78b4fde59f31ff [2021-11-20 06:20:03,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:20:03,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:20:03,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:20:03,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:20:03,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:20:03,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:20:03" (1/1) ... [2021-11-20 06:20:03,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a54707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:03, skipping insertion in model container [2021-11-20 06:20:03,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:20:03" (1/1) ... [2021-11-20 06:20:03,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:20:03,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:20:04,037 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-20 06:20:04,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:20:04,451 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:20:04,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/sv-benchmarks/c/product-lines/elevator_spec2_product17.cil.c[17414,17427] [2021-11-20 06:20:04,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:20:04,653 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:20:04,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04 WrapperNode [2021-11-20 06:20:04,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:20:04,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:20:04,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:20:04,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:20:04,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,711 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,818 INFO L137 Inliner]: procedures = 90, calls = 332, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 802 [2021-11-20 06:20:04,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:20:04,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:20:04,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:20:04,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:20:04,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:20:04,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:20:04,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:20:04,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:20:04,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (1/1) ... [2021-11-20 06:20:04,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:20:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:20:05,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:20:05,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:20:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:20:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 06:20:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 06:20:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 06:20:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 06:20:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 06:20:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 06:20:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 06:20:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 06:20:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 06:20:05,063 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 06:20:05,063 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 06:20:05,063 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 06:20:05,064 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 06:20:05,064 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 06:20:05,064 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 06:20:05,064 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 06:20:05,064 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 06:20:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 06:20:05,065 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 06:20:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 06:20:05,065 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 06:20:05,066 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 06:20:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 06:20:05,066 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 06:20:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 06:20:05,066 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 06:20:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 06:20:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 06:20:05,067 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 06:20:05,067 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 06:20:05,068 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 06:20:05,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 06:20:05,068 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 06:20:05,069 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 06:20:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:20:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 06:20:05,070 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 06:20:05,070 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 06:20:05,071 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 06:20:05,071 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 06:20:05,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 06:20:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:20:05,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:20:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 06:20:05,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 06:20:05,275 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:20:05,277 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:20:06,668 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:20:06,691 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:20:06,691 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:20:06,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:20:06 BoogieIcfgContainer [2021-11-20 06:20:06,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:20:06,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:20:06,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:20:06,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:20:06,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:20:03" (1/3) ... [2021-11-20 06:20:06,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b000313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:20:06, skipping insertion in model container [2021-11-20 06:20:06,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:04" (2/3) ... [2021-11-20 06:20:06,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b000313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:20:06, skipping insertion in model container [2021-11-20 06:20:06,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:20:06" (3/3) ... [2021-11-20 06:20:06,734 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product17.cil.c [2021-11-20 06:20:06,747 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:20:06,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:20:06,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:20:06,843 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:20:06,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:20:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 532 states, 421 states have (on average 1.7102137767220902) internal successors, (720), 442 states have internal predecessors, (720), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-20 06:20:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 06:20:06,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:06,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:06,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1249329355, now seen corresponding path program 1 times [2021-11-20 06:20:06,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:06,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119433517] [2021-11-20 06:20:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:06,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:07,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:20:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:07,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:07,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:20:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:08,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:20:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:08,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:20:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:08,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-20 06:20:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:08,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119433517] [2021-11-20 06:20:08,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119433517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:08,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:08,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:20:08,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678528564] [2021-11-20 06:20:08,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:08,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:20:08,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:08,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:20:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:20:08,282 INFO L87 Difference]: Start difference. First operand has 532 states, 421 states have (on average 1.7102137767220902) internal successors, (720), 442 states have internal predecessors, (720), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:20:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:19,567 INFO L93 Difference]: Finished difference Result 1504 states and 2610 transitions. [2021-11-20 06:20:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:20:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2021-11-20 06:20:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:19,612 INFO L225 Difference]: With dead ends: 1504 [2021-11-20 06:20:19,612 INFO L226 Difference]: Without dead ends: 984 [2021-11-20 06:20:19,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:20:19,632 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 1768 mSDsluCounter, 2471 mSDsCounter, 0 mSdLazyCounter, 4373 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 5184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 4373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:19,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1840 Valid, 3424 Invalid, 5184 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [811 Valid, 4373 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-20 06:20:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-20 06:20:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 526. [2021-11-20 06:20:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 417 states have (on average 1.7026378896882495) internal successors, (710), 436 states have internal predecessors, (710), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-20 06:20:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 881 transitions. [2021-11-20 06:20:19,936 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 881 transitions. Word has length 74 [2021-11-20 06:20:19,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:19,937 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 881 transitions. [2021-11-20 06:20:19,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:20:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 881 transitions. [2021-11-20 06:20:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 06:20:19,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:19,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:19,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:20:19,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 498321993, now seen corresponding path program 1 times [2021-11-20 06:20:19,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41589050] [2021-11-20 06:20:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:19,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:20:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:20:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:20:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:20:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:20:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:20,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:20,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41589050] [2021-11-20 06:20:20,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41589050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:20,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:20,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:20:20,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952607980] [2021-11-20 06:20:20,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:20,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:20:20,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:20:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:20:20,586 INFO L87 Difference]: Start difference. First operand 526 states and 881 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:20:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:29,517 INFO L93 Difference]: Finished difference Result 1329 states and 2262 transitions. [2021-11-20 06:20:29,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:20:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2021-11-20 06:20:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:29,529 INFO L225 Difference]: With dead ends: 1329 [2021-11-20 06:20:29,530 INFO L226 Difference]: Without dead ends: 821 [2021-11-20 06:20:29,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:20:29,536 INFO L933 BasicCegarLoop]: 980 mSDtfsCounter, 986 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 4782 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 4172 SdHoareTripleChecker+Invalid, 5084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 4782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:29,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1056 Valid, 4172 Invalid, 5084 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [302 Valid, 4782 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 06:20:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-11-20 06:20:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 530. [2021-11-20 06:20:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 420 states have (on average 1.6952380952380952) internal successors, (712), 439 states have internal predecessors, (712), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (85), 82 states have call predecessors, (85), 83 states have call successors, (85) [2021-11-20 06:20:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 885 transitions. [2021-11-20 06:20:29,650 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 885 transitions. Word has length 80 [2021-11-20 06:20:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:29,650 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 885 transitions. [2021-11-20 06:20:29,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:20:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 885 transitions. [2021-11-20 06:20:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 06:20:29,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:29,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:29,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:20:29,659 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:29,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:29,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1135044575, now seen corresponding path program 1 times [2021-11-20 06:20:29,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:29,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284487478] [2021-11-20 06:20:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:29,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:20:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:29,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-20 06:20:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-20 06:20:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:30,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:30,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:20:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:30,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-20 06:20:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:30,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284487478] [2021-11-20 06:20:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284487478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:30,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:30,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:20:30,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156105777] [2021-11-20 06:20:30,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:30,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:20:30,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:20:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:20:30,182 INFO L87 Difference]: Start difference. First operand 530 states and 885 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:20:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:47,043 INFO L93 Difference]: Finished difference Result 2470 states and 4345 transitions. [2021-11-20 06:20:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:20:47,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-11-20 06:20:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:47,070 INFO L225 Difference]: With dead ends: 2470 [2021-11-20 06:20:47,070 INFO L226 Difference]: Without dead ends: 1958 [2021-11-20 06:20:47,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:20:47,080 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 4267 mSDsluCounter, 3562 mSDsCounter, 0 mSdLazyCounter, 7407 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4345 SdHoareTripleChecker+Valid, 4617 SdHoareTripleChecker+Invalid, 9198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 7407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:47,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4345 Valid, 4617 Invalid, 9198 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1791 Valid, 7407 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2021-11-20 06:20:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-11-20 06:20:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1395. [2021-11-20 06:20:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1094 states have (on average 1.653564899451554) internal successors, (1809), 1141 states have internal predecessors, (1809), 241 states have call successors, (241), 56 states have call predecessors, (241), 59 states have return successors, (275), 233 states have call predecessors, (275), 236 states have call successors, (275) [2021-11-20 06:20:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2325 transitions. [2021-11-20 06:20:47,395 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2325 transitions. Word has length 85 [2021-11-20 06:20:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:47,404 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 2325 transitions. [2021-11-20 06:20:47,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 8 states have internal predecessors, (68), 3 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:20:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2325 transitions. [2021-11-20 06:20:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:20:47,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:47,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:47,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:20:47,413 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash 150471569, now seen corresponding path program 1 times [2021-11-20 06:20:47,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:47,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627578774] [2021-11-20 06:20:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:47,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:20:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-20 06:20:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-20 06:20:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:20:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:20:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:20:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:47,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:47,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627578774] [2021-11-20 06:20:47,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627578774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:47,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:47,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:20:47,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185761344] [2021-11-20 06:20:47,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:47,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:20:47,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:47,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:20:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:20:47,986 INFO L87 Difference]: Start difference. First operand 1395 states and 2325 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:20:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:54,776 INFO L93 Difference]: Finished difference Result 3439 states and 5902 transitions. [2021-11-20 06:20:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:20:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2021-11-20 06:20:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:54,801 INFO L225 Difference]: With dead ends: 3439 [2021-11-20 06:20:54,801 INFO L226 Difference]: Without dead ends: 1921 [2021-11-20 06:20:54,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:20:54,827 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 2783 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 4230 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2844 SdHoareTripleChecker+Valid, 3749 SdHoareTripleChecker+Invalid, 4907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 4230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:54,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2844 Valid, 3749 Invalid, 4907 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [677 Valid, 4230 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 06:20:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-11-20 06:20:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1395. [2021-11-20 06:20:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1094 states have (on average 1.6371115173674589) internal successors, (1791), 1141 states have internal predecessors, (1791), 241 states have call successors, (241), 56 states have call predecessors, (241), 59 states have return successors, (275), 233 states have call predecessors, (275), 236 states have call successors, (275) [2021-11-20 06:20:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2307 transitions. [2021-11-20 06:20:55,165 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2307 transitions. Word has length 94 [2021-11-20 06:20:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:55,166 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 2307 transitions. [2021-11-20 06:20:55,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:20:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2307 transitions. [2021-11-20 06:20:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 06:20:55,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:55,173 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:20:55,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:20:55,173 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:20:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:55,174 INFO L85 PathProgramCache]: Analyzing trace with hash 202169523, now seen corresponding path program 1 times [2021-11-20 06:20:55,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:55,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142548370] [2021-11-20 06:20:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:55,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:20:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-20 06:20:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-20 06:20:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:20:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:20:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:20:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:20:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:20:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:20:55,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:55,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142548370] [2021-11-20 06:20:55,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142548370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:55,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:55,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:20:55,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738817380] [2021-11-20 06:20:55,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:55,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:20:55,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:20:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:55,617 INFO L87 Difference]: Start difference. First operand 1395 states and 2307 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:00,392 INFO L93 Difference]: Finished difference Result 3298 states and 5574 transitions. [2021-11-20 06:21:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:21:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-20 06:21:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:00,419 INFO L225 Difference]: With dead ends: 3298 [2021-11-20 06:21:00,420 INFO L226 Difference]: Without dead ends: 1921 [2021-11-20 06:21:00,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:21:00,462 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 1327 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:00,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1399 Valid, 2303 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-20 06:21:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-11-20 06:21:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1395. [2021-11-20 06:21:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1094 states have (on average 1.636197440585009) internal successors, (1790), 1141 states have internal predecessors, (1790), 241 states have call successors, (241), 56 states have call predecessors, (241), 59 states have return successors, (275), 233 states have call predecessors, (275), 236 states have call successors, (275) [2021-11-20 06:21:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 2306 transitions. [2021-11-20 06:21:00,749 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 2306 transitions. Word has length 97 [2021-11-20 06:21:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:00,751 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 2306 transitions. [2021-11-20 06:21:00,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 2306 transitions. [2021-11-20 06:21:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 06:21:00,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:00,763 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:00,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:21:00,764 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -582363142, now seen corresponding path program 1 times [2021-11-20 06:21:00,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:00,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633109114] [2021-11-20 06:21:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:00,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:00,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:00,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:00,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-20 06:21:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:21:01,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:01,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633109114] [2021-11-20 06:21:01,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633109114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:01,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:01,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:21:01,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024826543] [2021-11-20 06:21:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:01,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:21:01,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:21:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:21:01,285 INFO L87 Difference]: Start difference. First operand 1395 states and 2306 transitions. Second operand has 12 states, 11 states have (on average 7.0) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:21:08,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:09,001 INFO L93 Difference]: Finished difference Result 3380 states and 5808 transitions. [2021-11-20 06:21:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:21:09,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.0) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 98 [2021-11-20 06:21:09,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:09,026 INFO L225 Difference]: With dead ends: 3380 [2021-11-20 06:21:09,026 INFO L226 Difference]: Without dead ends: 2043 [2021-11-20 06:21:09,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:21:09,040 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 1615 mSDsluCounter, 4254 mSDsCounter, 0 mSdLazyCounter, 5808 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 5174 SdHoareTripleChecker+Invalid, 6358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 5808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:09,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 5174 Invalid, 6358 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [550 Valid, 5808 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 06:21:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-11-20 06:21:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1415. [2021-11-20 06:21:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1104 states have (on average 1.6259057971014492) internal successors, (1795), 1158 states have internal predecessors, (1795), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2346 transitions. [2021-11-20 06:21:09,374 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2346 transitions. Word has length 98 [2021-11-20 06:21:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:09,375 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2346 transitions. [2021-11-20 06:21:09,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.0) internal successors, (77), 8 states have internal predecessors, (77), 3 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:21:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2346 transitions. [2021-11-20 06:21:09,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 06:21:09,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:09,383 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:09,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:21:09,384 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1237331055, now seen corresponding path program 1 times [2021-11-20 06:21:09,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:09,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146195049] [2021-11-20 06:21:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:09,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:21:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:09,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:09,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146195049] [2021-11-20 06:21:09,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146195049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:09,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:09,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:21:09,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284301242] [2021-11-20 06:21:09,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:09,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:21:09,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:21:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:21:09,813 INFO L87 Difference]: Start difference. First operand 1415 states and 2346 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:15,130 INFO L93 Difference]: Finished difference Result 3304 states and 5621 transitions. [2021-11-20 06:21:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:21:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-20 06:21:15,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:15,150 INFO L225 Difference]: With dead ends: 3304 [2021-11-20 06:21:15,150 INFO L226 Difference]: Without dead ends: 1947 [2021-11-20 06:21:15,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:21:15,162 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 964 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 2309 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:15,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 2309 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 06:21:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-11-20 06:21:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1415. [2021-11-20 06:21:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1104 states have (on average 1.6213768115942029) internal successors, (1790), 1158 states have internal predecessors, (1790), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2341 transitions. [2021-11-20 06:21:15,495 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2341 transitions. Word has length 99 [2021-11-20 06:21:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:15,496 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2341 transitions. [2021-11-20 06:21:15,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2341 transitions. [2021-11-20 06:21:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 06:21:15,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:15,500 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:15,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:21:15,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash 689977238, now seen corresponding path program 1 times [2021-11-20 06:21:15,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:15,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617952934] [2021-11-20 06:21:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:15,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:21:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:15,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:15,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617952934] [2021-11-20 06:21:15,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617952934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:15,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:15,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:21:15,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668936810] [2021-11-20 06:21:15,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:15,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:21:15,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:15,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:21:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:21:15,951 INFO L87 Difference]: Start difference. First operand 1415 states and 2341 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:21,328 INFO L93 Difference]: Finished difference Result 3304 states and 5616 transitions. [2021-11-20 06:21:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:21:21,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 100 [2021-11-20 06:21:21,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:21,352 INFO L225 Difference]: With dead ends: 3304 [2021-11-20 06:21:21,352 INFO L226 Difference]: Without dead ends: 1947 [2021-11-20 06:21:21,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:21:21,363 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 1357 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 2694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:21,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 2283 Invalid, 2694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 06:21:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-11-20 06:21:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1415. [2021-11-20 06:21:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1104 states have (on average 1.6168478260869565) internal successors, (1785), 1158 states have internal predecessors, (1785), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2336 transitions. [2021-11-20 06:21:21,654 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2336 transitions. Word has length 100 [2021-11-20 06:21:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:21,654 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2336 transitions. [2021-11-20 06:21:21,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2336 transitions. [2021-11-20 06:21:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:21:21,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:21,661 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:21,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:21:21,661 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1769918004, now seen corresponding path program 1 times [2021-11-20 06:21:21,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:21,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533325518] [2021-11-20 06:21:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:21,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:21,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:21,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:21,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:21:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:22,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:22,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533325518] [2021-11-20 06:21:22,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533325518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:22,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:22,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:21:22,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195556235] [2021-11-20 06:21:22,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:22,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:21:22,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:22,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:21:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:21:22,184 INFO L87 Difference]: Start difference. First operand 1415 states and 2336 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:27,193 INFO L93 Difference]: Finished difference Result 3304 states and 5611 transitions. [2021-11-20 06:21:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:21:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 101 [2021-11-20 06:21:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:27,216 INFO L225 Difference]: With dead ends: 3304 [2021-11-20 06:21:27,216 INFO L226 Difference]: Without dead ends: 1947 [2021-11-20 06:21:27,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:21:27,227 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 1783 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 2625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:27,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1855 Valid, 2218 Invalid, 2625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 06:21:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-11-20 06:21:27,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1415. [2021-11-20 06:21:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1104 states have (on average 1.6123188405797102) internal successors, (1780), 1158 states have internal predecessors, (1780), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 2331 transitions. [2021-11-20 06:21:27,633 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 2331 transitions. Word has length 101 [2021-11-20 06:21:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:27,633 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 2331 transitions. [2021-11-20 06:21:27,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 2331 transitions. [2021-11-20 06:21:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:21:27,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:27,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:27,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:21:27,637 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1707733771, now seen corresponding path program 1 times [2021-11-20 06:21:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:27,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499299928] [2021-11-20 06:21:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:27,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:27,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:27,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-20 06:21:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:28,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499299928] [2021-11-20 06:21:28,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499299928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:28,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:28,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:21:28,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273034453] [2021-11-20 06:21:28,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:28,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:21:28,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:21:28,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:21:28,129 INFO L87 Difference]: Start difference. First operand 1415 states and 2331 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:21:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:34,826 INFO L93 Difference]: Finished difference Result 3327 states and 5640 transitions. [2021-11-20 06:21:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:21:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-20 06:21:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:34,840 INFO L225 Difference]: With dead ends: 3327 [2021-11-20 06:21:34,841 INFO L226 Difference]: Without dead ends: 1976 [2021-11-20 06:21:34,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:21:34,850 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1785 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1858 SdHoareTripleChecker+Valid, 3768 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:34,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1858 Valid, 3768 Invalid, 4756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [559 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:21:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-11-20 06:21:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1417. [2021-11-20 06:21:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1106 states have (on average 1.6112115732368897) internal successors, (1782), 1160 states have internal predecessors, (1782), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2333 transitions. [2021-11-20 06:21:35,253 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2333 transitions. Word has length 101 [2021-11-20 06:21:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:35,254 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2333 transitions. [2021-11-20 06:21:35,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:21:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2333 transitions. [2021-11-20 06:21:35,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:21:35,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:35,259 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:35,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:21:35,260 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:35,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1500797937, now seen corresponding path program 1 times [2021-11-20 06:21:35,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:35,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877349434] [2021-11-20 06:21:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:35,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:35,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:35,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877349434] [2021-11-20 06:21:35,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877349434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:35,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:35,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:21:35,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727520211] [2021-11-20 06:21:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:35,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:21:35,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:21:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:21:35,682 INFO L87 Difference]: Start difference. First operand 1417 states and 2333 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:40,340 INFO L93 Difference]: Finished difference Result 3310 states and 5612 transitions. [2021-11-20 06:21:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:21:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 102 [2021-11-20 06:21:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:40,397 INFO L225 Difference]: With dead ends: 3310 [2021-11-20 06:21:40,397 INFO L226 Difference]: Without dead ends: 1951 [2021-11-20 06:21:40,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:21:40,404 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 1780 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:40,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1852 Valid, 2217 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:21:40,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-11-20 06:21:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1417. [2021-11-20 06:21:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1106 states have (on average 1.6066907775768535) internal successors, (1777), 1160 states have internal predecessors, (1777), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2328 transitions. [2021-11-20 06:21:40,729 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2328 transitions. Word has length 102 [2021-11-20 06:21:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:40,730 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2328 transitions. [2021-11-20 06:21:40,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2328 transitions. [2021-11-20 06:21:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-20 06:21:40,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:40,734 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:21:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:21:40,735 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1754249388, now seen corresponding path program 1 times [2021-11-20 06:21:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797233289] [2021-11-20 06:21:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:40,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:40,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:40,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:40,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:41,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:41,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797233289] [2021-11-20 06:21:41,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797233289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:41,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:41,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:21:41,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601060194] [2021-11-20 06:21:41,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:21:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:41,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:21:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:21:41,229 INFO L87 Difference]: Start difference. First operand 1417 states and 2328 transitions. Second operand has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:21:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:48,117 INFO L93 Difference]: Finished difference Result 3331 states and 5637 transitions. [2021-11-20 06:21:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:21:48,118 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2021-11-20 06:21:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:48,132 INFO L225 Difference]: With dead ends: 3331 [2021-11-20 06:21:48,133 INFO L226 Difference]: Without dead ends: 1980 [2021-11-20 06:21:48,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:21:48,140 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 975 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 4405 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 3904 SdHoareTripleChecker+Invalid, 4684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 4405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:48,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 3904 Invalid, 4684 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [279 Valid, 4405 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-20 06:21:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-11-20 06:21:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1420. [2021-11-20 06:21:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1109 states have (on average 1.6050495942290353) internal successors, (1780), 1163 states have internal predecessors, (1780), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2331 transitions. [2021-11-20 06:21:48,415 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2331 transitions. Word has length 102 [2021-11-20 06:21:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:48,416 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 2331 transitions. [2021-11-20 06:21:48,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.555555555555555) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:21:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2331 transitions. [2021-11-20 06:21:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:21:48,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:48,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:48,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:21:48,422 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2031834119, now seen corresponding path program 1 times [2021-11-20 06:21:48,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024733650] [2021-11-20 06:21:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:48,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:21:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:48,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:48,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024733650] [2021-11-20 06:21:48,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024733650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:48,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:48,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:21:48,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325251412] [2021-11-20 06:21:48,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:48,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:21:48,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:21:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:21:48,915 INFO L87 Difference]: Start difference. First operand 1420 states and 2331 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:53,608 INFO L93 Difference]: Finished difference Result 3359 states and 5666 transitions. [2021-11-20 06:21:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:21:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 103 [2021-11-20 06:21:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:53,631 INFO L225 Difference]: With dead ends: 3359 [2021-11-20 06:21:53,631 INFO L226 Difference]: Without dead ends: 1957 [2021-11-20 06:21:53,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:21:53,641 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 1296 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:53,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1368 Valid, 2291 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 06:21:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2021-11-20 06:21:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1420. [2021-11-20 06:21:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1109 states have (on average 1.6041478809738503) internal successors, (1779), 1163 states have internal predecessors, (1779), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:21:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2330 transitions. [2021-11-20 06:21:53,927 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2330 transitions. Word has length 103 [2021-11-20 06:21:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:53,927 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 2330 transitions. [2021-11-20 06:21:53,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:21:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2330 transitions. [2021-11-20 06:21:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:21:53,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:53,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:53,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:21:53,933 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:21:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 863637864, now seen corresponding path program 1 times [2021-11-20 06:21:53,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545637104] [2021-11-20 06:21:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:53,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:21:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:21:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:21:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:21:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:21:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:21:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:21:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:21:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:21:54,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:54,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545637104] [2021-11-20 06:21:54,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545637104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:54,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:54,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:21:54,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738649684] [2021-11-20 06:21:54,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:54,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:21:54,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:21:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:21:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:21:54,466 INFO L87 Difference]: Start difference. First operand 1420 states and 2330 transitions. Second operand has 12 states, 11 states have (on average 7.090909090909091) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:22:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:01,982 INFO L93 Difference]: Finished difference Result 3319 states and 5616 transitions. [2021-11-20 06:22:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:22:01,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.090909090909091) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2021-11-20 06:22:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:01,999 INFO L225 Difference]: With dead ends: 3319 [2021-11-20 06:22:02,000 INFO L226 Difference]: Without dead ends: 1947 [2021-11-20 06:22:02,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:22:02,007 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 1010 mSDsluCounter, 3940 mSDsCounter, 0 mSdLazyCounter, 5853 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 4847 SdHoareTripleChecker+Invalid, 6122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 5853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:02,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 4847 Invalid, 6122 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [269 Valid, 5853 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-20 06:22:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-11-20 06:22:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1412. [2021-11-20 06:22:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1101 states have (on average 1.6058128973660308) internal successors, (1768), 1155 states have internal predecessors, (1768), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:22:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2319 transitions. [2021-11-20 06:22:02,335 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2319 transitions. Word has length 103 [2021-11-20 06:22:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:02,335 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 2319 transitions. [2021-11-20 06:22:02,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.090909090909091) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:22:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2319 transitions. [2021-11-20 06:22:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-20 06:22:02,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:02,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:02,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:22:02,342 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:02,343 INFO L85 PathProgramCache]: Analyzing trace with hash -530005529, now seen corresponding path program 1 times [2021-11-20 06:22:02,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:02,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032916123] [2021-11-20 06:22:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:02,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:22:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:22:02,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-20 06:22:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:22:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:22:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:22:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:22:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:22:02,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032916123] [2021-11-20 06:22:02,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032916123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:02,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:22:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26503094] [2021-11-20 06:22:02,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:02,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:22:02,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:22:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:22:02,781 INFO L87 Difference]: Start difference. First operand 1412 states and 2319 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:22:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:08,951 INFO L93 Difference]: Finished difference Result 3319 states and 5612 transitions. [2021-11-20 06:22:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:22:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 103 [2021-11-20 06:22:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:08,962 INFO L225 Difference]: With dead ends: 3319 [2021-11-20 06:22:08,962 INFO L226 Difference]: Without dead ends: 1968 [2021-11-20 06:22:08,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:22:08,969 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 948 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:08,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 2322 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:22:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-11-20 06:22:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1416. [2021-11-20 06:22:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1105 states have (on average 1.6036199095022625) internal successors, (1772), 1159 states have internal predecessors, (1772), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:22:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2323 transitions. [2021-11-20 06:22:09,283 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2323 transitions. Word has length 103 [2021-11-20 06:22:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:09,284 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 2323 transitions. [2021-11-20 06:22:09,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:22:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2323 transitions. [2021-11-20 06:22:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-20 06:22:09,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:09,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:09,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:22:09,289 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2020186962, now seen corresponding path program 1 times [2021-11-20 06:22:09,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:09,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199831361] [2021-11-20 06:22:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:09,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:22:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:22:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:22:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:22:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:22:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:22:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:22:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:22:09,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:09,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199831361] [2021-11-20 06:22:09,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199831361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:09,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:09,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:22:09,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843680651] [2021-11-20 06:22:09,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:22:09,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:22:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:22:09,733 INFO L87 Difference]: Start difference. First operand 1416 states and 2323 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:22:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:15,818 INFO L93 Difference]: Finished difference Result 3327 states and 5618 transitions. [2021-11-20 06:22:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:22:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2021-11-20 06:22:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:15,842 INFO L225 Difference]: With dead ends: 3327 [2021-11-20 06:22:15,842 INFO L226 Difference]: Without dead ends: 1976 [2021-11-20 06:22:15,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:22:15,848 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 942 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 2329 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:15,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 2329 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-20 06:22:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-11-20 06:22:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1421. [2021-11-20 06:22:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1110 states have (on average 1.600900900900901) internal successors, (1777), 1164 states have internal predecessors, (1777), 244 states have call successors, (244), 56 states have call predecessors, (244), 66 states have return successors, (307), 236 states have call predecessors, (307), 239 states have call successors, (307) [2021-11-20 06:22:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2328 transitions. [2021-11-20 06:22:16,210 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2328 transitions. Word has length 104 [2021-11-20 06:22:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:16,211 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 2328 transitions. [2021-11-20 06:22:16,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:22:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2328 transitions. [2021-11-20 06:22:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-20 06:22:16,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:16,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:16,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:22:16,215 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:22:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:16,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1255357678, now seen corresponding path program 1 times [2021-11-20 06:22:16,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:22:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737637581] [2021-11-20 06:22:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:16,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:22:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:22:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:22:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:22:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:22:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:22:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:22:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:22:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:22:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:22:16,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:22:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737637581] [2021-11-20 06:22:16,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737637581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:16,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:16,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 06:22:16,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481519502] [2021-11-20 06:22:16,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:16,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:22:16,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:22:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:22:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:22:16,897 INFO L87 Difference]: Start difference. First operand 1421 states and 2328 transitions. Second operand has 16 states, 15 states have (on average 5.333333333333333) internal successors, (80), 12 states have internal predecessors, (80), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:23:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:03,050 INFO L93 Difference]: Finished difference Result 6672 states and 11743 transitions. [2021-11-20 06:23:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-20 06:23:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.333333333333333) internal successors, (80), 12 states have internal predecessors, (80), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 105 [2021-11-20 06:23:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:03,095 INFO L225 Difference]: With dead ends: 6672 [2021-11-20 06:23:03,096 INFO L226 Difference]: Without dead ends: 5325 [2021-11-20 06:23:03,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3157 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1333, Invalid=7409, Unknown=0, NotChecked=0, Total=8742 [2021-11-20 06:23:03,197 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 9947 mSDsluCounter, 7305 mSDsCounter, 0 mSdLazyCounter, 21214 mSolverCounterSat, 5132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10022 SdHoareTripleChecker+Valid, 8859 SdHoareTripleChecker+Invalid, 26346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 5132 IncrementalHoareTripleChecker+Valid, 21214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:03,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10022 Valid, 8859 Invalid, 26346 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [5132 Valid, 21214 Invalid, 0 Unknown, 0 Unchecked, 35.6s Time] [2021-11-20 06:23:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2021-11-20 06:23:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 3116. [2021-11-20 06:23:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 2434 states have (on average 1.576417419884963) internal successors, (3837), 2552 states have internal predecessors, (3837), 524 states have call successors, (524), 124 states have call predecessors, (524), 157 states have return successors, (699), 511 states have call predecessors, (699), 519 states have call successors, (699) [2021-11-20 06:23:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 5060 transitions. [2021-11-20 06:23:03,989 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 5060 transitions. Word has length 105 [2021-11-20 06:23:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:03,990 INFO L470 AbstractCegarLoop]: Abstraction has 3116 states and 5060 transitions. [2021-11-20 06:23:03,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.333333333333333) internal successors, (80), 12 states have internal predecessors, (80), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:23:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 5060 transitions. [2021-11-20 06:23:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-20 06:23:03,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:03,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:03,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:23:03,995 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:23:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1449647346, now seen corresponding path program 1 times [2021-11-20 06:23:03,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:03,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849095590] [2021-11-20 06:23:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:03,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:23:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:23:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:23:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:23:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:23:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:23:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:23:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:23:04,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849095590] [2021-11-20 06:23:04,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849095590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:23:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076830006] [2021-11-20 06:23:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:04,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:23:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:23:04,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:23:04,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:23:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:23:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:23:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:23:05,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:23:05,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076830006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:05,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:23:05,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2021-11-20 06:23:05,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330965203] [2021-11-20 06:23:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:05,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:23:05,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:23:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:23:05,500 INFO L87 Difference]: Start difference. First operand 3116 states and 5060 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 06:23:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:06,687 INFO L93 Difference]: Finished difference Result 3232 states and 5247 transitions. [2021-11-20 06:23:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:23:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 106 [2021-11-20 06:23:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:06,711 INFO L225 Difference]: With dead ends: 3232 [2021-11-20 06:23:06,712 INFO L226 Difference]: Without dead ends: 3217 [2021-11-20 06:23:06,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:23:06,716 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 853 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:06,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1480 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:23:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3217 states. [2021-11-20 06:23:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3217 to 3125. [2021-11-20 06:23:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2443 states have (on average 1.5742939009414654) internal successors, (3846), 2561 states have internal predecessors, (3846), 524 states have call successors, (524), 124 states have call predecessors, (524), 157 states have return successors, (699), 511 states have call predecessors, (699), 519 states have call successors, (699) [2021-11-20 06:23:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5069 transitions. [2021-11-20 06:23:07,598 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5069 transitions. Word has length 106 [2021-11-20 06:23:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:07,599 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 5069 transitions. [2021-11-20 06:23:07,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-20 06:23:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5069 transitions. [2021-11-20 06:23:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 06:23:07,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:07,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:07,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:23:07,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:23:07,849 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:23:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:07,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1690886665, now seen corresponding path program 1 times [2021-11-20 06:23:07,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:07,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389485099] [2021-11-20 06:23:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:07,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:23:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:23:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:23:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:23:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:23:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:23:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:23:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:23:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:23:08,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389485099] [2021-11-20 06:23:08,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389485099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:08,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:08,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:23:08,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887364810] [2021-11-20 06:23:08,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:08,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:23:08,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:23:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:23:08,354 INFO L87 Difference]: Start difference. First operand 3125 states and 5069 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:23:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:21,002 INFO L93 Difference]: Finished difference Result 4245 states and 7195 transitions. [2021-11-20 06:23:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:23:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-11-20 06:23:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:21,032 INFO L225 Difference]: With dead ends: 4245 [2021-11-20 06:23:21,032 INFO L226 Difference]: Without dead ends: 4230 [2021-11-20 06:23:21,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:23:21,039 INFO L933 BasicCegarLoop]: 922 mSDtfsCounter, 3236 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 4581 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3303 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 5745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 4581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:21,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3303 Valid, 3085 Invalid, 5745 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1164 Valid, 4581 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-11-20 06:23:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2021-11-20 06:23:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 3125. [2021-11-20 06:23:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 2443 states have (on average 1.5714285714285714) internal successors, (3839), 2561 states have internal predecessors, (3839), 524 states have call successors, (524), 124 states have call predecessors, (524), 157 states have return successors, (699), 511 states have call predecessors, (699), 519 states have call successors, (699) [2021-11-20 06:23:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 5062 transitions. [2021-11-20 06:23:21,980 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 5062 transitions. Word has length 112 [2021-11-20 06:23:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:21,981 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 5062 transitions. [2021-11-20 06:23:21,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:23:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 5062 transitions. [2021-11-20 06:23:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 06:23:21,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:21,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:21,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:23:21,986 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:23:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2057524241, now seen corresponding path program 1 times [2021-11-20 06:23:21,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:21,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192813547] [2021-11-20 06:23:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:21,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:23:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:23:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:23:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:23:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:23:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:23:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:23:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:23:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:23:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:23:22,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192813547] [2021-11-20 06:23:22,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192813547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:22,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:22,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:23:22,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113859089] [2021-11-20 06:23:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:22,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:23:22,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:23:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:23:22,569 INFO L87 Difference]: Start difference. First operand 3125 states and 5062 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:23:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:23:41,744 INFO L93 Difference]: Finished difference Result 8095 states and 13728 transitions. [2021-11-20 06:23:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:23:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2021-11-20 06:23:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:23:41,786 INFO L225 Difference]: With dead ends: 8095 [2021-11-20 06:23:41,787 INFO L226 Difference]: Without dead ends: 5056 [2021-11-20 06:23:41,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 06:23:41,808 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 6801 mSDsluCounter, 2139 mSDsCounter, 0 mSdLazyCounter, 8114 mSolverCounterSat, 3368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6802 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 11482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3368 IncrementalHoareTripleChecker+Valid, 8114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:23:41,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6802 Valid, 2948 Invalid, 11482 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3368 Valid, 8114 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2021-11-20 06:23:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-11-20 06:23:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 3141. [2021-11-20 06:23:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 2455 states have (on average 1.564969450101833) internal successors, (3842), 2573 states have internal predecessors, (3842), 524 states have call successors, (524), 124 states have call predecessors, (524), 161 states have return successors, (740), 515 states have call predecessors, (740), 519 states have call successors, (740) [2021-11-20 06:23:42,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 5106 transitions. [2021-11-20 06:23:42,832 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 5106 transitions. Word has length 123 [2021-11-20 06:23:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:23:42,833 INFO L470 AbstractCegarLoop]: Abstraction has 3141 states and 5106 transitions. [2021-11-20 06:23:42,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:23:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 5106 transitions. [2021-11-20 06:23:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:23:42,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:23:42,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:23:42,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:23:42,839 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:23:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:23:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1179129061, now seen corresponding path program 1 times [2021-11-20 06:23:42,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:23:42,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076628888] [2021-11-20 06:23:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:23:42,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:23:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:42,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:23:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:23:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:23:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:23:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:23:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:23:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:23:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:23:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:23:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:23:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:23:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:23:43,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:23:43,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076628888] [2021-11-20 06:23:43,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076628888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:23:43,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:23:43,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:23:43,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318764283] [2021-11-20 06:23:43,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:23:43,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:23:43,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:23:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:23:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:23:43,360 INFO L87 Difference]: Start difference. First operand 3141 states and 5106 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:24:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:27,275 INFO L93 Difference]: Finished difference Result 15676 states and 28071 transitions. [2021-11-20 06:24:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 06:24:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 124 [2021-11-20 06:24:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:27,515 INFO L225 Difference]: With dead ends: 15676 [2021-11-20 06:24:27,515 INFO L226 Difference]: Without dead ends: 12621 [2021-11-20 06:24:27,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=539, Invalid=1813, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 06:24:27,544 INFO L933 BasicCegarLoop]: 1072 mSDtfsCounter, 7843 mSDsluCounter, 2452 mSDsCounter, 0 mSdLazyCounter, 10137 mSolverCounterSat, 4974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7910 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 15111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4974 IncrementalHoareTripleChecker+Valid, 10137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:27,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7910 Valid, 3524 Invalid, 15111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4974 Valid, 10137 Invalid, 0 Unknown, 0 Unchecked, 34.5s Time] [2021-11-20 06:24:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12621 states. [2021-11-20 06:24:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12621 to 8202. [2021-11-20 06:24:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8202 states, 6105 states have (on average 1.549058149058149) internal successors, (9457), 6524 states have internal predecessors, (9457), 1747 states have call successors, (1747), 242 states have call predecessors, (1747), 349 states have return successors, (2690), 1723 states have call predecessors, (2690), 1742 states have call successors, (2690) [2021-11-20 06:24:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8202 states to 8202 states and 13894 transitions. [2021-11-20 06:24:30,704 INFO L78 Accepts]: Start accepts. Automaton has 8202 states and 13894 transitions. Word has length 124 [2021-11-20 06:24:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:30,705 INFO L470 AbstractCegarLoop]: Abstraction has 8202 states and 13894 transitions. [2021-11-20 06:24:30,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-20 06:24:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8202 states and 13894 transitions. [2021-11-20 06:24:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 06:24:30,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:30,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:30,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:24:30,716 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:24:30,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash 701479761, now seen corresponding path program 1 times [2021-11-20 06:24:30,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:30,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690620178] [2021-11-20 06:24:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:30,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:30,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:24:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:24:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:30,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:24:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:24:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:24:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:24:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:24:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:24:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-20 06:24:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-20 06:24:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:24:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-20 06:24:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:24:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:24:31,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690620178] [2021-11-20 06:24:31,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690620178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:31,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161232179] [2021-11-20 06:24:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:31,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:31,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:31,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:31,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:24:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:31,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 1505 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:24:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:24:32,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:24:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:24:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161232179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:24:32,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:24:32,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 13 [2021-11-20 06:24:32,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704125805] [2021-11-20 06:24:32,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:24:32,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:24:32,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:24:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:24:32,936 INFO L87 Difference]: Start difference. First operand 8202 states and 13894 transitions. Second operand has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 10 states have internal predecessors, (144), 6 states have call successors, (26), 8 states have call predecessors, (26), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-20 06:24:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:24:52,113 INFO L93 Difference]: Finished difference Result 21249 states and 37861 transitions. [2021-11-20 06:24:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:24:52,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 10 states have internal predecessors, (144), 6 states have call successors, (26), 8 states have call predecessors, (26), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 132 [2021-11-20 06:24:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:24:52,376 INFO L225 Difference]: With dead ends: 21249 [2021-11-20 06:24:52,376 INFO L226 Difference]: Without dead ends: 13129 [2021-11-20 06:24:52,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:24:52,440 INFO L933 BasicCegarLoop]: 1121 mSDtfsCounter, 3762 mSDsluCounter, 1966 mSDsCounter, 0 mSdLazyCounter, 5012 mSolverCounterSat, 1271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3823 SdHoareTripleChecker+Valid, 3087 SdHoareTripleChecker+Invalid, 6283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1271 IncrementalHoareTripleChecker+Valid, 5012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:24:52,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3823 Valid, 3087 Invalid, 6283 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1271 Valid, 5012 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2021-11-20 06:24:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13129 states. [2021-11-20 06:24:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13129 to 9164. [2021-11-20 06:24:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9164 states, 6855 states have (on average 1.5393143690736688) internal successors, (10552), 7307 states have internal predecessors, (10552), 1899 states have call successors, (1899), 282 states have call predecessors, (1899), 409 states have return successors, (2957), 1865 states have call predecessors, (2957), 1894 states have call successors, (2957) [2021-11-20 06:24:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9164 states to 9164 states and 15408 transitions. [2021-11-20 06:24:55,770 INFO L78 Accepts]: Start accepts. Automaton has 9164 states and 15408 transitions. Word has length 132 [2021-11-20 06:24:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:24:55,770 INFO L470 AbstractCegarLoop]: Abstraction has 9164 states and 15408 transitions. [2021-11-20 06:24:55,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 10 states have internal predecessors, (144), 6 states have call successors, (26), 8 states have call predecessors, (26), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-20 06:24:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9164 states and 15408 transitions. [2021-11-20 06:24:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:24:55,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:24:55,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:24:55,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:24:55,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:55,992 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:24:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:24:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash 207187003, now seen corresponding path program 1 times [2021-11-20 06:24:55,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:24:55,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103097009] [2021-11-20 06:24:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:55,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:24:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:24:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:24:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:24:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:24:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:24:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:24:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-20 06:24:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:24:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:24:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-20 06:24:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:24:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:24:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-20 06:24:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:24:56,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:24:56,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103097009] [2021-11-20 06:24:56,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103097009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:24:56,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88005800] [2021-11-20 06:24:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:24:56,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:24:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:24:56,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:24:56,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:24:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:24:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:24:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:24:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:24:57,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:24:57,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88005800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:24:57,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:24:57,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-11-20 06:24:57,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138233903] [2021-11-20 06:24:57,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:24:57,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:24:57,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:24:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:24:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:24:57,264 INFO L87 Difference]: Start difference. First operand 9164 states and 15408 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:25:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:03,418 INFO L93 Difference]: Finished difference Result 25410 states and 43228 transitions. [2021-11-20 06:25:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:25:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 136 [2021-11-20 06:25:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:03,530 INFO L225 Difference]: With dead ends: 25410 [2021-11-20 06:25:03,530 INFO L226 Difference]: Without dead ends: 16304 [2021-11-20 06:25:03,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:25:03,574 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 943 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:03,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 3320 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:25:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16304 states. [2021-11-20 06:25:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16304 to 15519. [2021-11-20 06:25:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15519 states, 11450 states have (on average 1.5572052401746725) internal successors, (17830), 12276 states have internal predecessors, (17830), 3415 states have call successors, (3415), 482 states have call predecessors, (3415), 653 states have return successors, (4769), 3385 states have call predecessors, (4769), 3410 states have call successors, (4769) [2021-11-20 06:25:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15519 states to 15519 states and 26014 transitions. [2021-11-20 06:25:09,201 INFO L78 Accepts]: Start accepts. Automaton has 15519 states and 26014 transitions. Word has length 136 [2021-11-20 06:25:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:09,202 INFO L470 AbstractCegarLoop]: Abstraction has 15519 states and 26014 transitions. [2021-11-20 06:25:09,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-20 06:25:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 15519 states and 26014 transitions. [2021-11-20 06:25:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-20 06:25:09,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:09,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:09,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:25:09,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada86fad-bab0-46ad-b2c3-222c1a949afd/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:25:09,440 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:09,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:09,440 INFO L85 PathProgramCache]: Analyzing trace with hash -491403103, now seen corresponding path program 1 times [2021-11-20 06:25:09,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:09,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444433672] [2021-11-20 06:25:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:09,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:25:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:25:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:25:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:25:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:25:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:09,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:25:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:25:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:25:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:10,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:25:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:25:10,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:10,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444433672] [2021-11-20 06:25:10,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444433672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:10,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:25:10,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:25:10,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886451188] [2021-11-20 06:25:10,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:10,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:25:10,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:10,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:25:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:25:10,049 INFO L87 Difference]: Start difference. First operand 15519 states and 26014 transitions. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:25:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:25:31,153 INFO L93 Difference]: Finished difference Result 38041 states and 66689 transitions. [2021-11-20 06:25:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:25:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 135 [2021-11-20 06:25:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:25:31,342 INFO L225 Difference]: With dead ends: 38041 [2021-11-20 06:25:31,342 INFO L226 Difference]: Without dead ends: 22620 [2021-11-20 06:25:31,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:25:31,410 INFO L933 BasicCegarLoop]: 997 mSDtfsCounter, 3403 mSDsluCounter, 3041 mSDsCounter, 0 mSdLazyCounter, 5551 mSolverCounterSat, 1113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 4038 SdHoareTripleChecker+Invalid, 6664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1113 IncrementalHoareTripleChecker+Valid, 5551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:25:31,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 4038 Invalid, 6664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1113 Valid, 5551 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-11-20 06:25:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-11-20 06:25:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 16030. [2021-11-20 06:25:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16030 states, 11941 states have (on average 1.549200234486224) internal successors, (18499), 12732 states have internal predecessors, (18499), 3383 states have call successors, (3383), 544 states have call predecessors, (3383), 705 states have return successors, (4673), 3353 states have call predecessors, (4673), 3378 states have call successors, (4673) [2021-11-20 06:25:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16030 states to 16030 states and 26555 transitions. [2021-11-20 06:25:36,743 INFO L78 Accepts]: Start accepts. Automaton has 16030 states and 26555 transitions. Word has length 135 [2021-11-20 06:25:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:25:36,744 INFO L470 AbstractCegarLoop]: Abstraction has 16030 states and 26555 transitions. [2021-11-20 06:25:36,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 7 states have internal predecessors, (99), 4 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 06:25:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 16030 states and 26555 transitions. [2021-11-20 06:25:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-20 06:25:36,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:25:36,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:25:36,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:25:36,758 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:25:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:25:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash 468694886, now seen corresponding path program 1 times [2021-11-20 06:25:36,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:25:36,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576902527] [2021-11-20 06:25:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:25:36,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:25:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:36,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 06:25:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:36,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 06:25:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-20 06:25:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:25:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-20 06:25:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:25:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:25:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:25:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-20 06:25:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:25:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:25:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:25:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:25:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:25:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:25:37,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:25:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576902527] [2021-11-20 06:25:37,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576902527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:25:37,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:25:37,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:25:37,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993560813] [2021-11-20 06:25:37,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:25:37,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:25:37,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:25:37,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:25:37,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:25:37,357 INFO L87 Difference]: Start difference. First operand 16030 states and 26555 transitions. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 5 states have internal predecessors, (101), 5 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-20 06:26:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:10,225 INFO L93 Difference]: Finished difference Result 69016 states and 129549 transitions. [2021-11-20 06:26:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:26:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 5 states have internal predecessors, (101), 5 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 141 [2021-11-20 06:26:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:11,009 INFO L225 Difference]: With dead ends: 69016 [2021-11-20 06:26:11,009 INFO L226 Difference]: Without dead ends: 53072 [2021-11-20 06:26:11,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:26:11,148 INFO L933 BasicCegarLoop]: 1117 mSDtfsCounter, 6389 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 2293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6458 SdHoareTripleChecker+Valid, 2320 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2293 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:11,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6458 Valid, 2320 Invalid, 4581 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2293 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-11-20 06:26:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53072 states.