./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/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_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/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 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:38:26,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:38:26,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:38:26,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:38:26,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:38:26,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:38:26,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:38:26,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:38:26,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:38:26,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:38:26,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:38:26,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:38:26,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:38:26,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:38:26,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:38:26,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:38:26,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:38:26,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:38:26,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:38:26,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:38:26,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:38:26,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:38:26,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:38:26,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:38:26,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:38:26,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:38:26,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:38:26,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:38:26,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:38:26,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:38:26,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:38:26,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:38:26,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:38:26,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:38:27,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:38:27,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:38:27,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:38:27,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:38:27,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:38:27,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:38:27,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:38:27,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 07:38:27,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:38:27,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:38:27,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:38:27,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:38:27,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:38:27,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:38:27,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:38:27,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:38:27,070 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:38:27,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:38:27,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:38:27,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:38:27,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:38:27,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:38:27,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:38:27,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:38:27,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:38:27,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:38:27,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:38:27,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:38:27,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:38:27,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:38:27,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:38:27,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:38:27,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:38:27,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:38:27,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:38:27,077 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:38:27,077 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:38:27,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:38:27,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:38:27,079 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_3518cb9d-6bb6-49c3-a009-571d43711336/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2021-11-20 07:38:27,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:38:27,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:38:27,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:38:27,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:38:27,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:38:27,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-11-20 07:38:27,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/data/ebed8c823/e9ee41a927f3489aa923226f1f04e2a2/FLAG45e25276d [2021-11-20 07:38:28,594 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:38:28,595 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-11-20 07:38:28,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/data/ebed8c823/e9ee41a927f3489aa923226f1f04e2a2/FLAG45e25276d [2021-11-20 07:38:28,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/data/ebed8c823/e9ee41a927f3489aa923226f1f04e2a2 [2021-11-20 07:38:28,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:38:28,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:38:28,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:38:28,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:38:28,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:38:28,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:38:28" (1/1) ... [2021-11-20 07:38:28,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea50a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:28, skipping insertion in model container [2021-11-20 07:38:28,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:38:28" (1/1) ... [2021-11-20 07:38:28,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:38:29,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:38:29,985 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-11-20 07:38:29,988 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-11-20 07:38:30,344 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_3518cb9d-6bb6-49c3-a009-571d43711336/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-11-20 07:38:31,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:38:31,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:38:31,806 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-11-20 07:38:31,808 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-11-20 07:38:31,817 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_3518cb9d-6bb6-49c3-a009-571d43711336/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-11-20 07:38:32,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:38:32,298 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:38:32,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32 WrapperNode [2021-11-20 07:38:32,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:38:32,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:38:32,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:38:32,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:38:32,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,675 INFO L137 Inliner]: procedures = 202, calls = 1968, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2095 [2021-11-20 07:38:32,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:38:32,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:38:32,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:38:32,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:38:32,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:38:32,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:38:32,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:38:32,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:38:32,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (1/1) ... [2021-11-20 07:38:32,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:38:32,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:32,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:38:32,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:38:33,018 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-11-20 07:38:33,019 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-11-20 07:38:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-20 07:38:33,019 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-20 07:38:33,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 07:38:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 07:38:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 07:38:33,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 07:38:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-20 07:38:33,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-20 07:38:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 07:38:33,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 07:38:33,021 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 07:38:33,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 07:38:33,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:38:33,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:38:33,021 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2021-11-20 07:38:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2021-11-20 07:38:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 07:38:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 07:38:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:38:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:38:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-20 07:38:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-20 07:38:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 07:38:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 07:38:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2021-11-20 07:38:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2021-11-20 07:38:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:38:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:38:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-20 07:38:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-20 07:38:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-20 07:38:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-20 07:38:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 07:38:33,025 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 07:38:33,025 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-20 07:38:33,025 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-20 07:38:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 07:38:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 07:38:33,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 07:38:33,026 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2021-11-20 07:38:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2021-11-20 07:38:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2021-11-20 07:38:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2021-11-20 07:38:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 07:38:33,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 07:38:33,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 07:38:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2021-11-20 07:38:33,028 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2021-11-20 07:38:33,028 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2021-11-20 07:38:33,029 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2021-11-20 07:38:33,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:38:33,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 07:38:33,031 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 07:38:33,031 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2021-11-20 07:38:33,032 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2021-11-20 07:38:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-20 07:38:33,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-20 07:38:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 07:38:33,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 07:38:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 07:38:33,034 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 07:38:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:38:33,035 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-11-20 07:38:33,035 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-11-20 07:38:33,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:38:33,035 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-20 07:38:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-20 07:38:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:38:33,036 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2021-11-20 07:38:33,036 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2021-11-20 07:38:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:38:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2021-11-20 07:38:33,037 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2021-11-20 07:38:33,037 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2021-11-20 07:38:33,037 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2021-11-20 07:38:33,038 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-20 07:38:33,038 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-20 07:38:33,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:38:33,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:38:33,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:38:33,601 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:38:33,604 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:38:33,899 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 07:38:39,118 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:38:39,158 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:38:39,159 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:38:39,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:38:39 BoogieIcfgContainer [2021-11-20 07:38:39,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:38:39,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:38:39,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:38:39,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:38:39,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:38:28" (1/3) ... [2021-11-20 07:38:39,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d7b53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:38:39, skipping insertion in model container [2021-11-20 07:38:39,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:32" (2/3) ... [2021-11-20 07:38:39,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d7b53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:38:39, skipping insertion in model container [2021-11-20 07:38:39,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:38:39" (3/3) ... [2021-11-20 07:38:39,178 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-11-20 07:38:39,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:38:39,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:38:39,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:38:39,260 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 07:38:39,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:38:39,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-20 07:38:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:38:39,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:39,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:39,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2015975527, now seen corresponding path program 1 times [2021-11-20 07:38:39,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:39,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112626497] [2021-11-20 07:38:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:39,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:40,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:38:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:40,158 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 07:38:40,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:40,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112626497] [2021-11-20 07:38:40,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112626497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:40,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:40,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:38:40,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724874333] [2021-11-20 07:38:40,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:40,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:38:40,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:38:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:40,226 INFO L87 Difference]: Start difference. First operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:38:44,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:38:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:44,826 INFO L93 Difference]: Finished difference Result 1083 states and 1544 transitions. [2021-11-20 07:38:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:38:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-20 07:38:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:44,853 INFO L225 Difference]: With dead ends: 1083 [2021-11-20 07:38:44,853 INFO L226 Difference]: Without dead ends: 563 [2021-11-20 07:38:44,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:38:44,871 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 216 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:44,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1343 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-20 07:38:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-20 07:38:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-11-20 07:38:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 389 states have internal predecessors, (517), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-20 07:38:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 702 transitions. [2021-11-20 07:38:45,027 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 702 transitions. Word has length 30 [2021-11-20 07:38:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:45,028 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 702 transitions. [2021-11-20 07:38:45,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:38:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 702 transitions. [2021-11-20 07:38:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:38:45,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:45,040 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] [2021-11-20 07:38:45,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:38:45,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1592596621, now seen corresponding path program 1 times [2021-11-20 07:38:45,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178718489] [2021-11-20 07:38:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:45,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:45,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:38:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:45,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:38:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:38:45,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178718489] [2021-11-20 07:38:45,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178718489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:45,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:45,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:38:45,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013988206] [2021-11-20 07:38:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:45,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:38:45,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:38:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:45,421 INFO L87 Difference]: Start difference. First operand 512 states and 702 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:38:49,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:38:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:49,616 INFO L93 Difference]: Finished difference Result 1067 states and 1492 transitions. [2021-11-20 07:38:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:38:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-20 07:38:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:49,627 INFO L225 Difference]: With dead ends: 1067 [2021-11-20 07:38:49,628 INFO L226 Difference]: Without dead ends: 571 [2021-11-20 07:38:49,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:49,641 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 173 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:49,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1314 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 495 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 07:38:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-20 07:38:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 519. [2021-11-20 07:38:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 392 states have (on average 1.344387755102041) internal successors, (527), 396 states have internal predecessors, (527), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-20 07:38:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 712 transitions. [2021-11-20 07:38:49,761 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 712 transitions. Word has length 49 [2021-11-20 07:38:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:49,762 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 712 transitions. [2021-11-20 07:38:49,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:38:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 712 transitions. [2021-11-20 07:38:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 07:38:49,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:49,767 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:38:49,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:38:49,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash -725279773, now seen corresponding path program 1 times [2021-11-20 07:38:49,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:49,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158245164] [2021-11-20 07:38:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:49,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:50,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:38:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:50,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:38:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:38:50,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158245164] [2021-11-20 07:38:50,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158245164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:50,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:50,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:38:50,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038970845] [2021-11-20 07:38:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:50,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:38:50,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:38:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:50,168 INFO L87 Difference]: Start difference. First operand 519 states and 712 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:38:54,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:38:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:54,356 INFO L93 Difference]: Finished difference Result 1115 states and 1567 transitions. [2021-11-20 07:38:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:38:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2021-11-20 07:38:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:54,365 INFO L225 Difference]: With dead ends: 1115 [2021-11-20 07:38:54,366 INFO L226 Difference]: Without dead ends: 612 [2021-11-20 07:38:54,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:54,371 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 222 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:54,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1315 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 501 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 07:38:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-20 07:38:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 560. [2021-11-20 07:38:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 431 states have (on average 1.359628770301624) internal successors, (586), 435 states have internal predecessors, (586), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-20 07:38:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 775 transitions. [2021-11-20 07:38:54,419 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 775 transitions. Word has length 55 [2021-11-20 07:38:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:54,420 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 775 transitions. [2021-11-20 07:38:54,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:38:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 775 transitions. [2021-11-20 07:38:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 07:38:54,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:54,426 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] [2021-11-20 07:38:54,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:38:54,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash -232463337, now seen corresponding path program 1 times [2021-11-20 07:38:54,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:54,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940010764] [2021-11-20 07:38:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:54,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:54,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:38:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:38:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:54,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:38:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:38:54,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:54,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940010764] [2021-11-20 07:38:54,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940010764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:54,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:54,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:38:54,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231040152] [2021-11-20 07:38:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:54,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:38:54,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:38:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:38:54,824 INFO L87 Difference]: Start difference. First operand 560 states and 775 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:38:59,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:02,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:05,167 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:05,443 INFO L93 Difference]: Finished difference Result 1531 states and 2229 transitions. [2021-11-20 07:39:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:39:05,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2021-11-20 07:39:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:05,456 INFO L225 Difference]: With dead ends: 1531 [2021-11-20 07:39:05,456 INFO L226 Difference]: Without dead ends: 987 [2021-11-20 07:39:05,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:39:05,461 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 701 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 346 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:05,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1543 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 934 Invalid, 3 Unknown, 0 Unchecked, 10.4s Time] [2021-11-20 07:39:05,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-11-20 07:39:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 562. [2021-11-20 07:39:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 433 states have (on average 1.3579676674364896) internal successors, (588), 437 states have internal predecessors, (588), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-20 07:39:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 777 transitions. [2021-11-20 07:39:05,530 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 777 transitions. Word has length 78 [2021-11-20 07:39:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:05,531 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 777 transitions. [2021-11-20 07:39:05,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 777 transitions. [2021-11-20 07:39:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 07:39:05,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:05,536 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] [2021-11-20 07:39:05,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:39:05,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1595880674, now seen corresponding path program 1 times [2021-11-20 07:39:05,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:05,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512633630] [2021-11-20 07:39:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:05,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:05,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:05,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:05,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:39:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:39:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:39:05,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:05,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512633630] [2021-11-20 07:39:05,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512633630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:39:05,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:39:05,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:39:05,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900485301] [2021-11-20 07:39:05,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:39:05,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:39:05,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:05,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:39:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:39:05,892 INFO L87 Difference]: Start difference. First operand 562 states and 777 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:39:09,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:10,782 INFO L93 Difference]: Finished difference Result 1344 states and 1870 transitions. [2021-11-20 07:39:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:39:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 81 [2021-11-20 07:39:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:10,789 INFO L225 Difference]: With dead ends: 1344 [2021-11-20 07:39:10,789 INFO L226 Difference]: Without dead ends: 798 [2021-11-20 07:39:10,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:39:10,794 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 944 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 424 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:10,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1303 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 777 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-20 07:39:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-20 07:39:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 703. [2021-11-20 07:39:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 537 states have (on average 1.3463687150837989) internal successors, (723), 542 states have internal predecessors, (723), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-20 07:39:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 958 transitions. [2021-11-20 07:39:10,853 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 958 transitions. Word has length 81 [2021-11-20 07:39:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:10,853 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 958 transitions. [2021-11-20 07:39:10,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:39:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 958 transitions. [2021-11-20 07:39:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 07:39:10,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:10,857 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] [2021-11-20 07:39:10,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:39:10,858 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:10,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1746632066, now seen corresponding path program 1 times [2021-11-20 07:39:10,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:10,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582156808] [2021-11-20 07:39:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:10,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:11,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:39:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:39:11,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582156808] [2021-11-20 07:39:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582156808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:39:11,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:39:11,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:39:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689273509] [2021-11-20 07:39:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:39:11,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:39:11,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:39:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:39:11,197 INFO L87 Difference]: Start difference. First operand 703 states and 958 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:17,802 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:19,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:22,218 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:24,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:24,453 INFO L93 Difference]: Finished difference Result 1869 states and 2665 transitions. [2021-11-20 07:39:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:39:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-20 07:39:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:24,465 INFO L225 Difference]: With dead ends: 1869 [2021-11-20 07:39:24,465 INFO L226 Difference]: Without dead ends: 1182 [2021-11-20 07:39:24,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:39:24,471 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 620 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 258 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:24,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 2079 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1089 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2021-11-20 07:39:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-11-20 07:39:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 757. [2021-11-20 07:39:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 591 states have (on average 1.365482233502538) internal successors, (807), 596 states have internal predecessors, (807), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-20 07:39:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1042 transitions. [2021-11-20 07:39:24,532 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1042 transitions. Word has length 83 [2021-11-20 07:39:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:24,533 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1042 transitions. [2021-11-20 07:39:24,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:24,534 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1042 transitions. [2021-11-20 07:39:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 07:39:24,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:24,536 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] [2021-11-20 07:39:24,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:39:24,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -247512640, now seen corresponding path program 1 times [2021-11-20 07:39:24,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:24,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550053556] [2021-11-20 07:39:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:24,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:39:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:39:24,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550053556] [2021-11-20 07:39:24,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550053556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:24,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466476605] [2021-11-20 07:39:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:24,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:24,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:24,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:24,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:39:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2880 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:39:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:39:25,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:39:26,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466476605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:26,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:39:26,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-11-20 07:39:26,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17605525] [2021-11-20 07:39:26,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:26,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:39:26,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:39:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:39:26,121 INFO L87 Difference]: Start difference. First operand 757 states and 1042 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:33,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:35,270 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:37,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:39,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:40,324 INFO L93 Difference]: Finished difference Result 3177 states and 4755 transitions. [2021-11-20 07:39:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:39:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-20 07:39:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:40,344 INFO L225 Difference]: With dead ends: 3177 [2021-11-20 07:39:40,344 INFO L226 Difference]: Without dead ends: 2436 [2021-11-20 07:39:40,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:39:40,349 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 2119 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 834 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:40,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2331 Valid, 2517 Invalid, 2673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [834 Valid, 1835 Invalid, 4 Unknown, 0 Unchecked, 13.8s Time] [2021-11-20 07:39:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-11-20 07:39:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 817. [2021-11-20 07:39:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 651 states have (on average 1.368663594470046) internal successors, (891), 656 states have internal predecessors, (891), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-20 07:39:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1126 transitions. [2021-11-20 07:39:40,427 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1126 transitions. Word has length 83 [2021-11-20 07:39:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:40,429 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1126 transitions. [2021-11-20 07:39:40,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1126 transitions. [2021-11-20 07:39:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 07:39:40,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:40,438 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 07:39:40,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:40,659 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2050556224, now seen corresponding path program 1 times [2021-11-20 07:39:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777458801] [2021-11-20 07:39:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:40,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:40,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:39:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:40,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 07:39:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:40,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:39:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:39:40,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:40,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777458801] [2021-11-20 07:39:40,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777458801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:39:40,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:39:40,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:39:40,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381540067] [2021-11-20 07:39:40,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:39:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:39:40,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:39:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:39:40,972 INFO L87 Difference]: Start difference. First operand 817 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:39:44,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:46,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:48,320 INFO L93 Difference]: Finished difference Result 1685 states and 2342 transitions. [2021-11-20 07:39:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:39:48,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 96 [2021-11-20 07:39:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:48,327 INFO L225 Difference]: With dead ends: 1685 [2021-11-20 07:39:48,327 INFO L226 Difference]: Without dead ends: 884 [2021-11-20 07:39:48,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:39:48,334 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 772 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 442 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:48,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 2286 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1180 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-11-20 07:39:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-20 07:39:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2021-11-20 07:39:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 638 states have (on average 1.365203761755486) internal successors, (871), 643 states have internal predecessors, (871), 112 states have call successors, (112), 48 states have call predecessors, (112), 47 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-20 07:39:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1094 transitions. [2021-11-20 07:39:48,389 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1094 transitions. Word has length 96 [2021-11-20 07:39:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:48,389 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1094 transitions. [2021-11-20 07:39:48,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:39:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1094 transitions. [2021-11-20 07:39:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 07:39:48,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:48,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:48,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:39:48,394 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2089394007, now seen corresponding path program 2 times [2021-11-20 07:39:48,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:48,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146462905] [2021-11-20 07:39:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:48,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:48,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:48,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:39:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 07:39:48,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146462905] [2021-11-20 07:39:48,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146462905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:39:48,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:39:48,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:39:48,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954835893] [2021-11-20 07:39:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:39:48,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:39:48,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:39:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:39:48,682 INFO L87 Difference]: Start difference. First operand 798 states and 1094 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:52,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:54,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:39:55,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:55,548 INFO L93 Difference]: Finished difference Result 1092 states and 1550 transitions. [2021-11-20 07:39:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:39:55,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2021-11-20 07:39:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:55,556 INFO L225 Difference]: With dead ends: 1092 [2021-11-20 07:39:55,557 INFO L226 Difference]: Without dead ends: 1089 [2021-11-20 07:39:55,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:39:55,559 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1021 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 325 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:55,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1097 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-20 07:39:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-20 07:39:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 802. [2021-11-20 07:39:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 641 states have (on average 1.3634945397815912) internal successors, (874), 646 states have internal predecessors, (874), 112 states have call successors, (112), 49 states have call predecessors, (112), 48 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-20 07:39:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1097 transitions. [2021-11-20 07:39:55,622 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1097 transitions. Word has length 98 [2021-11-20 07:39:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:55,623 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1097 transitions. [2021-11-20 07:39:55,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:39:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1097 transitions. [2021-11-20 07:39:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-20 07:39:55,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:55,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-20 07:39:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:39:55,628 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:55,628 INFO L85 PathProgramCache]: Analyzing trace with hash -853712003, now seen corresponding path program 1 times [2021-11-20 07:39:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090383553] [2021-11-20 07:39:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:55,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:55,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:55,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 07:39:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-20 07:39:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 07:39:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 07:39:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:56,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 07:39:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:56,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 07:39:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:56,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:39:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:39:56,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:56,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090383553] [2021-11-20 07:39:56,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090383553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666643404] [2021-11-20 07:39:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:56,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:56,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:56,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:56,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:39:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:39:56,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:39:57,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:39:57,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666643404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:39:57,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:39:57,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-20 07:39:57,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496468389] [2021-11-20 07:39:57,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:39:57,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:39:57,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:39:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:39:57,141 INFO L87 Difference]: Start difference. First operand 802 states and 1097 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:39:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:57,333 INFO L93 Difference]: Finished difference Result 2141 states and 2940 transitions. [2021-11-20 07:39:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:39:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-11-20 07:39:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:57,345 INFO L225 Difference]: With dead ends: 2141 [2021-11-20 07:39:57,345 INFO L226 Difference]: Without dead ends: 1355 [2021-11-20 07:39:57,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:39:57,351 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 510 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4189 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:57,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 4189 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:39:57,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-11-20 07:39:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 806. [2021-11-20 07:39:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 644 states have (on average 1.3618012422360248) internal successors, (877), 649 states have internal predecessors, (877), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-11-20 07:39:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1101 transitions. [2021-11-20 07:39:57,424 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1101 transitions. Word has length 116 [2021-11-20 07:39:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:57,425 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1101 transitions. [2021-11-20 07:39:57,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:39:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1101 transitions. [2021-11-20 07:39:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-20 07:39:57,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:57,430 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:57,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:57,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:57,655 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2124736263, now seen corresponding path program 1 times [2021-11-20 07:39:57,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014163112] [2021-11-20 07:39:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:57,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:39:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:39:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:39:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:39:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:39:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 07:39:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 07:39:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 07:39:58,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 07:39:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:39:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 07:39:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 07:39:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 07:39:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 07:39:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 07:39:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-20 07:39:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:39:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 07:39:58,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014163112] [2021-11-20 07:39:58,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014163112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:39:58,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:39:58,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:39:58,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193384989] [2021-11-20 07:39:58,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:39:58,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:39:58,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:39:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:39:58,203 INFO L87 Difference]: Start difference. First operand 806 states and 1101 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 07:40:02,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:03,749 INFO L93 Difference]: Finished difference Result 1919 states and 2684 transitions. [2021-11-20 07:40:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:40:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 197 [2021-11-20 07:40:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:03,760 INFO L225 Difference]: With dead ends: 1919 [2021-11-20 07:40:03,760 INFO L226 Difference]: Without dead ends: 1129 [2021-11-20 07:40:03,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:40:03,765 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1070 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 551 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:03,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1565 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 1170 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-20 07:40:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-11-20 07:40:03,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 807. [2021-11-20 07:40:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 645 states have (on average 1.3612403100775194) internal successors, (878), 650 states have internal predecessors, (878), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-11-20 07:40:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1102 transitions. [2021-11-20 07:40:03,839 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1102 transitions. Word has length 197 [2021-11-20 07:40:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:03,840 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1102 transitions. [2021-11-20 07:40:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 07:40:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1102 transitions. [2021-11-20 07:40:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-20 07:40:03,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:03,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:03,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:40:03,846 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1201117839, now seen corresponding path program 1 times [2021-11-20 07:40:03,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:03,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159722569] [2021-11-20 07:40:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:03,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:40:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:40:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:40:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 07:40:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-20 07:40:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 07:40:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 07:40:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-20 07:40:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-20 07:40:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-20 07:40:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-20 07:40:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-20 07:40:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 07:40:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-20 07:40:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-20 07:40:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 07:40:04,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159722569] [2021-11-20 07:40:04,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159722569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661365256] [2021-11-20 07:40:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:04,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:04,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:04,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:40:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:05,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 3739 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:40:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:40:05,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:40:06,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661365256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:06,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:40:06,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2021-11-20 07:40:06,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245442288] [2021-11-20 07:40:06,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:06,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:40:06,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:40:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:40:06,523 INFO L87 Difference]: Start difference. First operand 807 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 07:40:15,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:20,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:22,502 INFO L93 Difference]: Finished difference Result 5881 states and 8943 transitions. [2021-11-20 07:40:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 07:40:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 207 [2021-11-20 07:40:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:22,539 INFO L225 Difference]: With dead ends: 5881 [2021-11-20 07:40:22,539 INFO L226 Difference]: Without dead ends: 5090 [2021-11-20 07:40:22,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 07:40:22,547 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 7508 mSDsluCounter, 4236 mSDsCounter, 0 mSdLazyCounter, 6280 mSolverCounterSat, 3532 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7879 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 9814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3532 IncrementalHoareTripleChecker+Valid, 6280 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:22,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7879 Valid, 4991 Invalid, 9814 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3532 Valid, 6280 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2021-11-20 07:40:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2021-11-20 07:40:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 934. [2021-11-20 07:40:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 771 states have (on average 1.364461738002594) internal successors, (1052), 776 states have internal predecessors, (1052), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2021-11-20 07:40:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1278 transitions. [2021-11-20 07:40:22,748 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1278 transitions. Word has length 207 [2021-11-20 07:40:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:22,748 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1278 transitions. [2021-11-20 07:40:22,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-20 07:40:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1278 transitions. [2021-11-20 07:40:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-20 07:40:22,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:22,754 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:22,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:22,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:40:22,971 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:22,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1247223031, now seen corresponding path program 2 times [2021-11-20 07:40:22,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:22,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187174284] [2021-11-20 07:40:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:22,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:40:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:40:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:40:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-20 07:40:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-20 07:40:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-20 07:40:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-20 07:40:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-20 07:40:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-20 07:40:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-20 07:40:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-20 07:40:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-20 07:40:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-20 07:40:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-11-20 07:40:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-20 07:40:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-20 07:40:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:40:23,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187174284] [2021-11-20 07:40:23,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187174284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392903416] [2021-11-20 07:40:23,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:40:23,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:23,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:23,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:40:24,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:40:24,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:40:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 3903 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:40:24,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 07:40:25,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-20 07:40:25,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392903416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:25,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:40:25,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 23 [2021-11-20 07:40:25,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222468444] [2021-11-20 07:40:25,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:25,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:40:25,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:40:25,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:40:25,727 INFO L87 Difference]: Start difference. First operand 934 states and 1278 transitions. Second operand has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 07:40:39,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:41,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:45,976 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:48,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:40:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:51,844 INFO L93 Difference]: Finished difference Result 8510 states and 13008 transitions. [2021-11-20 07:40:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-20 07:40:51,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 247 [2021-11-20 07:40:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:51,904 INFO L225 Difference]: With dead ends: 8510 [2021-11-20 07:40:51,904 INFO L226 Difference]: Without dead ends: 7592 [2021-11-20 07:40:51,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2442, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 07:40:51,913 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 11120 mSDsluCounter, 4899 mSDsCounter, 0 mSdLazyCounter, 7629 mSolverCounterSat, 4797 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11690 SdHoareTripleChecker+Valid, 5807 SdHoareTripleChecker+Invalid, 12430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4797 IncrementalHoareTripleChecker+Valid, 7629 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:51,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11690 Valid, 5807 Invalid, 12430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4797 Valid, 7629 Invalid, 4 Unknown, 0 Unchecked, 24.2s Time] [2021-11-20 07:40:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2021-11-20 07:40:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 1054. [2021-11-20 07:40:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 891 states have (on average 1.3692480359147026) internal successors, (1220), 896 states have internal predecessors, (1220), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2021-11-20 07:40:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1446 transitions. [2021-11-20 07:40:52,197 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1446 transitions. Word has length 247 [2021-11-20 07:40:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:52,198 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1446 transitions. [2021-11-20 07:40:52,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 07:40:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1446 transitions. [2021-11-20 07:40:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-20 07:40:52,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:52,208 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:52,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:52,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3518cb9d-6bb6-49c3-a009-571d43711336/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:40:52,435 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:52,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash 956437033, now seen corresponding path program 3 times [2021-11-20 07:40:52,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257993758] [2021-11-20 07:40:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:52,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:40:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-20 07:40:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-20 07:40:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-20 07:40:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-20 07:40:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 07:40:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-20 07:40:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-20 07:40:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-20 07:40:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-11-20 07:40:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-20 07:40:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-20 07:40:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-20 07:40:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-11-20 07:40:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-11-20 07:40:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2021-11-20 07:40:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 07:40:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2021-11-20 07:40:53,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257993758] [2021-11-20 07:40:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257993758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:40:53,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:40:53,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:40:53,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655645980] [2021-11-20 07:40:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:53,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:40:53,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:40:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:40:53,314 INFO L87 Difference]: Start difference. First operand 1054 states and 1446 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-20 07:40:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:54,345 INFO L93 Difference]: Finished difference Result 2036 states and 2856 transitions. [2021-11-20 07:40:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:40:54,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 277 [2021-11-20 07:40:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:54,348 INFO L225 Difference]: With dead ends: 2036 [2021-11-20 07:40:54,348 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 07:40:54,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:40:54,355 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 272 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:54,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 740 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:40:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 07:40:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 07:40:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:40:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 07:40:54,357 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 277 [2021-11-20 07:40:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:54,358 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 07:40:54,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-20 07:40:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 07:40:54,359 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 07:40:54,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:40:54,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:40:54,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 07:41:48,537 WARN L227 SmtUtils]: Spent 53.79s on a formula simplification. DAG size of input: 125 DAG size of output: 123 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 07:43:56,499 WARN L227 SmtUtils]: Spent 2.13m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 07:44:15,437 WARN L227 SmtUtils]: Spent 18.92s on a formula simplification. DAG size of input: 690 DAG size of output: 686 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 07:46:14,727 WARN L227 SmtUtils]: Spent 1.95m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 07:48:02,812 WARN L227 SmtUtils]: Spent 1.80m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)