./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7 --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 807baa6191d907795e80ff5436f6f636b6dbcf7109bdc782ca0ac1b857ff64f7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:30:58,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:30:58,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:30:58,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:30:58,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:30:58,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:30:58,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:30:58,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:30:58,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:30:58,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:30:58,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:30:59,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:30:59,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:30:59,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:30:59,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:30:59,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:30:59,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:30:59,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:30:59,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:30:59,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:30:59,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:30:59,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:30:59,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:30:59,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:30:59,046 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:30:59,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:30:59,047 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:30:59,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:30:59,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:30:59,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:30:59,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:30:59,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:30:59,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:30:59,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:30:59,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:30:59,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:30:59,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:30:59,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:30:59,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:30:59,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:30:59,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:30:59,064 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:30:59,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:30:59,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:30:59,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:30:59,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:30:59,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:30:59,121 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:30:59,121 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:30:59,122 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:30:59,122 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:30:59,122 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:30:59,123 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:30:59,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:30:59,124 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:30:59,124 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:30:59,124 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:30:59,125 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:30:59,125 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:30:59,125 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:30:59,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:30:59,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:30:59,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:30:59,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:30:59,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:30:59,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:30:59,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:30:59,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:30:59,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:30:59,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:30:59,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:30:59,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:30:59,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:30:59,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:30:59,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:30:59,132 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:30:59,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:30:59,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:30:59,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:30:59,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:30:59,133 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 807baa6191d907795e80ff5436f6f636b6dbcf7109bdc782ca0ac1b857ff64f7 [2021-11-25 18:30:59,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:30:59,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:30:59,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:30:59,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:30:59,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:30:59,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i [2021-11-25 18:30:59,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/data/e0a1cc2e7/9a23c80be4804fcc8bd47bbc6e21ae20/FLAGd53582460 [2021-11-25 18:31:00,725 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:31:00,726 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i [2021-11-25 18:31:00,802 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/data/e0a1cc2e7/9a23c80be4804fcc8bd47bbc6e21ae20/FLAGd53582460 [2021-11-25 18:31:00,913 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/data/e0a1cc2e7/9a23c80be4804fcc8bd47bbc6e21ae20 [2021-11-25 18:31:00,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:31:00,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:31:00,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:00,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:31:00,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:31:00,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:00" (1/1) ... [2021-11-25 18:31:00,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b38a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:00, skipping insertion in model container [2021-11-25 18:31:00,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:31:00" (1/1) ... [2021-11-25 18:31:00,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:31:01,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:31:06,789 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513173,513186] [2021-11-25 18:31:06,793 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513320,513333] [2021-11-25 18:31:06,794 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513459,513472] [2021-11-25 18:31:06,797 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513617,513630] [2021-11-25 18:31:06,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:06,968 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:31:07,740 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513173,513186] [2021-11-25 18:31:07,741 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513320,513333] [2021-11-25 18:31:07,742 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513459,513472] [2021-11-25 18:31:07,742 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_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i[513617,513630] [2021-11-25 18:31:07,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:31:08,192 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:31:08,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08 WrapperNode [2021-11-25 18:31:08,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:31:08,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:08,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:31:08,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:31:08,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:08,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:08,852 INFO L137 Inliner]: procedures = 619, calls = 4098, calls flagged for inlining = 350, calls inlined = 330, statements flattened = 9859 [2021-11-25 18:31:08,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:31:08,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:31:08,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:31:08,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:31:08,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:08,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:08,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:08,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:09,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:09,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:09,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:09,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:31:09,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:31:09,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:31:09,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:31:09,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (1/1) ... [2021-11-25 18:31:09,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:31:09,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:09,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:31:09,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:31:09,552 INFO L130 BoogieDeclarations]: Found specification of procedure ipv6_hdr [2021-11-25 18:31:09,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ipv6_hdr [2021-11-25 18:31:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-25 18:31:09,553 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-25 18:31:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:31:09,553 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:31:09,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_0_6 [2021-11-25 18:31:09,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_0_6 [2021-11-25 18:31:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clean_rx_irq [2021-11-25 18:31:09,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clean_rx_irq [2021-11-25 18:31:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_setup_rx_resources [2021-11-25 18:31:09,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_setup_rx_resources [2021-11-25 18:31:09,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:31:09,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:31:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_tx_ctxtdesc [2021-11-25 18:31:09,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_tx_ctxtdesc [2021-11-25 18:31:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure skb_header_pointer [2021-11-25 18:31:09,555 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_header_pointer [2021-11-25 18:31:09,555 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 18:31:09,555 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 18:31:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_eitr [2021-11-25 18:31:09,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_eitr [2021-11-25 18:31:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure usleep_range [2021-11-25 18:31:09,556 INFO L138 BoogieDeclarations]: Found implementation of procedure usleep_range [2021-11-25 18:31:09,556 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_uc_addr_vf [2021-11-25 18:31:09,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_uc_addr_vf [2021-11-25 18:31:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2021-11-25 18:31:09,557 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2021-11-25 18:31:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 18:31:09,557 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 18:31:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 18:31:09,557 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 18:31:09,557 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~~u32~0~X~~bool~0~TO~~s32~0 [2021-11-25 18:31:09,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~~u32~0~X~~bool~0~TO~~s32~0 [2021-11-25 18:31:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 18:31:09,558 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 18:31:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_desc_unused [2021-11-25 18:31:09,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_desc_unused [2021-11-25 18:31:09,558 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_poll_for_ack [2021-11-25 18:31:09,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_poll_for_ack [2021-11-25 18:31:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_setup_tx_resources [2021-11-25 18:31:09,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_setup_tx_resources [2021-11-25 18:31:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_remove [2021-11-25 18:31:09,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_remove [2021-11-25 18:31:09,559 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 18:31:09,559 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 18:31:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 18:31:09,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 18:31:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 18:31:09,560 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 18:31:09,560 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-25 18:31:09,560 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-25 18:31:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 18:31:09,561 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 18:31:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 18:31:09,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 18:31:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-25 18:31:09,561 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-25 18:31:09,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:31:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-25 18:31:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-25 18:31:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_resume [2021-11-25 18:31:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_resume [2021-11-25 18:31:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_del_timer_sync [2021-11-25 18:31:09,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_del_timer_sync [2021-11-25 18:31:09,562 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2021-11-25 18:31:09,563 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2021-11-25 18:31:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-25 18:31:09,563 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-25 18:31:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_mbx_vf [2021-11-25 18:31:09,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_mbx_vf [2021-11-25 18:31:09,563 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_read_posted_mbx [2021-11-25 18:31:09,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_read_posted_mbx [2021-11-25 18:31:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_read_mbx_vf [2021-11-25 18:31:09,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_read_mbx_vf [2021-11-25 18:31:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 18:31:09,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 18:31:09,564 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-25 18:31:09,564 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-25 18:31:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:31:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reinit_locked [2021-11-25 18:31:09,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reinit_locked [2021-11-25 18:31:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_up [2021-11-25 18:31:09,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_up [2021-11-25 18:31:09,565 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2021-11-25 18:31:09,566 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2021-11-25 18:31:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 18:31:09,566 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 18:31:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 18:31:09,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 18:31:09,566 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_irq [2021-11-25 18:31:09,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_irq [2021-11-25 18:31:09,567 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_rar_vf [2021-11-25 18:31:09,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_rar_vf [2021-11-25 18:31:09,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:31:09,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 18:31:09,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 18:31:09,567 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header_len [2021-11-25 18:31:09,567 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header_len [2021-11-25 18:31:09,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:31:09,568 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 18:31:09,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 18:31:09,568 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_vfta_vf [2021-11-25 18:31:09,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_vfta_vf [2021-11-25 18:31:09,568 INFO L130 BoogieDeclarations]: Found specification of procedure vzalloc [2021-11-25 18:31:09,569 INFO L138 BoogieDeclarations]: Found implementation of procedure vzalloc [2021-11-25 18:31:09,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:31:09,569 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:31:09,569 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_down [2021-11-25 18:31:09,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_down [2021-11-25 18:31:09,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 18:31:09,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 18:31:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-25 18:31:09,570 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-25 18:31:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 18:31:09,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 18:31:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure map_vector_to_txq [2021-11-25 18:31:09,570 INFO L138 BoogieDeclarations]: Found implementation of procedure map_vector_to_txq [2021-11-25 18:31:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_offset [2021-11-25 18:31:09,571 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_offset [2021-11-25 18:31:09,571 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_all_rx_resources [2021-11-25 18:31:09,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_all_rx_resources [2021-11-25 18:31:09,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 18:31:09,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 18:31:09,571 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-25 18:31:09,571 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-25 18:31:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_tx_timeout [2021-11-25 18:31:09,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_tx_timeout [2021-11-25 18:31:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-25 18:31:09,572 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-25 18:31:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure __udelay [2021-11-25 18:31:09,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __udelay [2021-11-25 18:31:09,572 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_negotiate_api [2021-11-25 18:31:09,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_negotiate_api [2021-11-25 18:31:09,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:31:09,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 18:31:09,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 18:31:09,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 18:31:09,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 18:31:09,573 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_2 [2021-11-25 18:31:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_2 [2021-11-25 18:31:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_alloc_rx_buffers [2021-11-25 18:31:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_alloc_rx_buffers [2021-11-25 18:31:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-25 18:31:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-25 18:31:09,574 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_interrupt_scheme [2021-11-25 18:31:09,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_interrupt_scheme [2021-11-25 18:31:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-25 18:31:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-25 18:31:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:31:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-25 18:31:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-25 18:31:09,575 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 18:31:09,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 18:31:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 18:31:09,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 18:31:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:31:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 18:31:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_tx_resources [2021-11-25 18:31:09,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_tx_resources [2021-11-25 18:31:09,576 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_hw_vf [2021-11-25 18:31:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_hw_vf [2021-11-25 18:31:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-25 18:31:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-25 18:31:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_maybe_stop_tx [2021-11-25 18:31:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_maybe_stop_tx [2021-11-25 18:31:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_msg_vf [2021-11-25 18:31:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_msg_vf [2021-11-25 18:31:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-25 18:31:09,578 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-25 18:31:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_busy_poll_recv [2021-11-25 18:31:09,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_busy_poll_recv [2021-11-25 18:31:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_posted_mbx [2021-11-25 18:31:09,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_posted_mbx [2021-11-25 18:31:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~TO~~s32~0 [2021-11-25 18:31:09,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~TO~~s32~0 [2021-11-25 18:31:09,579 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 18:31:09,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 18:31:09,579 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-25 18:31:09,579 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-25 18:31:09,579 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 18:31:09,579 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 18:31:09,580 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~~s32~0 [2021-11-25 18:31:09,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~~s32~0 [2021-11-25 18:31:09,580 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_last_counter_stats [2021-11-25 18:31:09,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_last_counter_stats [2021-11-25 18:31:09,580 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_io_resume [2021-11-25 18:31:09,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_io_resume [2021-11-25 18:31:09,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 18:31:09,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 18:31:09,581 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_up_complete [2021-11-25 18:31:09,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_up_complete [2021-11-25 18:31:09,581 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_bh [2021-11-25 18:31:09,581 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_bh [2021-11-25 18:31:09,581 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_ivar [2021-11-25 18:31:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_ivar [2021-11-25 18:31:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_bit_vf [2021-11-25 18:31:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_bit_vf [2021-11-25 18:31:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 18:31:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 18:31:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-25 18:31:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-25 18:31:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_shutdown [2021-11-25 18:31:09,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_shutdown [2021-11-25 18:31:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reset_interrupt_capability [2021-11-25 18:31:09,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reset_interrupt_capability [2021-11-25 18:31:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:31:09,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:31:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-25 18:31:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-25 18:31:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_nway_reset [2021-11-25 18:31:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_nway_reset [2021-11-25 18:31:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-25 18:31:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-25 18:31:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_obtain_mbx_lock_vf [2021-11-25 18:31:09,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_obtain_mbx_lock_vf [2021-11-25 18:31:09,584 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clean_tx_ring [2021-11-25 18:31:09,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clean_tx_ring [2021-11-25 18:31:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_rst_vf [2021-11-25 18:31:09,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_rst_vf [2021-11-25 18:31:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_read_v2p_mailbox [2021-11-25 18:31:09,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_read_v2p_mailbox [2021-11-25 18:31:09,585 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 18:31:09,585 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 18:31:09,586 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_for_ack_vf [2021-11-25 18:31:09,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_for_ack_vf [2021-11-25 18:31:09,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:31:09,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:31:09,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:31:09,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:31:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_update_stats [2021-11-25 18:31:09,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_update_stats [2021-11-25 18:31:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-25 18:31:09,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-25 18:31:09,587 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_irq_enable [2021-11-25 18:31:09,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_irq_enable [2021-11-25 18:31:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-25 18:31:09,588 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-25 18:31:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-25 18:31:09,588 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-25 18:31:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-25 18:31:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_start_hw_vf [2021-11-25 18:31:09,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_start_hw_vf [2021-11-25 18:31:09,588 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-25 18:31:09,589 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-25 18:31:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-25 18:31:09,589 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-25 18:31:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure napi_hash_del [2021-11-25 18:31:09,589 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_hash_del [2021-11-25 18:31:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 18:31:09,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 18:31:09,589 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_update_begin [2021-11-25 18:31:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_update_begin [2021-11-25 18:31:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_all_queues [2021-11-25 18:31:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_all_queues [2021-11-25 18:31:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_set_rx_mode [2021-11-25 18:31:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_set_rx_mode [2021-11-25 18:31:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2021-11-25 18:31:09,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2021-11-25 18:31:09,590 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-25 18:31:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-25 18:31:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:31:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:31:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~X~~u32~0~TO~~s32~0 [2021-11-25 18:31:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~$Pointer$~X~~u32~0~TO~~s32~0 [2021-11-25 18:31:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_poll_for_msg [2021-11-25 18:31:09,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_poll_for_msg [2021-11-25 18:31:09,591 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_suspend [2021-11-25 18:31:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_suspend [2021-11-25 18:31:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-25 18:31:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-25 18:31:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-25 18:31:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-25 18:31:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-25 18:31:09,592 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-25 18:31:09,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:31:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 18:31:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 18:31:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-25 18:31:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-25 18:31:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 18:31:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 18:31:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_link_test [2021-11-25 18:31:09,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_link_test [2021-11-25 18:31:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:31:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_vlan_rx_add_vid [2021-11-25 18:31:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_vlan_rx_add_vid [2021-11-25 18:31:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure map_vector_to_rxq [2021-11-25 18:31:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure map_vector_to_rxq [2021-11-25 18:31:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~~bool~0~TO~~s32~0 [2021-11-25 18:31:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~~bool~0~TO~~s32~0 [2021-11-25 18:31:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-25 18:31:09,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~s32~0 [2021-11-25 18:31:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2021-11-25 18:31:09,595 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2021-11-25 18:31:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:31:09,595 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_get_mac_addr_vf [2021-11-25 18:31:09,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_get_mac_addr_vf [2021-11-25 18:31:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_configure [2021-11-25 18:31:09,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_configure [2021-11-25 18:31:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_all_tx_resources [2021-11-25 18:31:09,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_all_tx_resources [2021-11-25 18:31:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 18:31:09,596 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 18:31:09,596 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-25 18:31:09,596 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-25 18:31:09,597 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_get_queues [2021-11-25 18:31:09,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_get_queues [2021-11-25 18:31:09,597 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 18:31:09,597 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 18:31:09,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq [2021-11-25 18:31:09,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq [2021-11-25 18:31:09,597 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_write_msg_read_ack [2021-11-25 18:31:09,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_write_msg_read_ack [2021-11-25 18:31:09,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 18:31:09,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 18:31:09,598 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 18:31:09,598 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 18:31:09,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-25 18:31:09,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-25 18:31:09,598 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-25 18:31:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-25 18:31:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-25 18:31:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-25 18:31:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_open [2021-11-25 18:31:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_open [2021-11-25 18:31:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-25 18:31:09,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u16~0~TO~~s32~0 [2021-11-25 18:31:09,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_ixgbevf_exit_module_17_2 [2021-11-25 18:31:09,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_ixgbevf_exit_module_17_2 [2021-11-25 18:31:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_check_mac_link_vf [2021-11-25 18:31:09,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_check_mac_link_vf [2021-11-25 18:31:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clear_interrupt_scheme [2021-11-25 18:31:09,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clear_interrupt_scheme [2021-11-25 18:31:09,600 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_get_regs_len [2021-11-25 18:31:09,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_get_regs_len [2021-11-25 18:31:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-25 18:31:09,601 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-25 18:31:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 18:31:09,601 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 18:31:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 18:31:09,601 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 18:31:09,601 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-25 18:31:09,601 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-25 18:31:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_update_mc_addr_list_vf [2021-11-25 18:31:09,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_update_mc_addr_list_vf [2021-11-25 18:31:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_rx_resources [2021-11-25 18:31:09,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_rx_resources [2021-11-25 18:31:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 18:31:09,602 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 18:31:09,602 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-25 18:31:09,602 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-25 18:31:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:31:09,603 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:31:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:31:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_init_mbx_params_vf [2021-11-25 18:31:09,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_init_mbx_params_vf [2021-11-25 18:31:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-25 18:31:09,603 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-25 18:31:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_free_q_vectors [2021-11-25 18:31:09,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_free_q_vectors [2021-11-25 18:31:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:31:09,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:31:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_disable_rx_queue [2021-11-25 18:31:09,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_disable_rx_queue [2021-11-25 18:31:09,604 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reset [2021-11-25 18:31:09,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reset [2021-11-25 18:31:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_close [2021-11-25 18:31:09,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_close [2021-11-25 18:31:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-25 18:31:09,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~$Pointer$~TO~int [2021-11-25 18:31:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device_mem [2021-11-25 18:31:09,605 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device_mem [2021-11-25 18:31:09,605 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_bh [2021-11-25 18:31:09,605 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_bh [2021-11-25 18:31:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 18:31:09,606 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 18:31:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-25 18:31:09,606 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-25 18:31:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-25 18:31:09,606 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-25 18:31:09,606 INFO L130 BoogieDeclarations]: Found specification of procedure dma_set_mask_and_coherent [2021-11-25 18:31:09,606 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_set_mask_and_coherent [2021-11-25 18:31:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdrlen [2021-11-25 18:31:09,607 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdrlen [2021-11-25 18:31:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2021-11-25 18:31:09,607 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2021-11-25 18:31:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-25 18:31:09,607 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-25 18:31:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 18:31:09,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 18:31:09,607 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-25 18:31:09,608 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-25 18:31:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-25 18:31:09,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2021-11-25 18:31:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_clean_rx_ring [2021-11-25 18:31:09,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_clean_rx_ring [2021-11-25 18:31:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_stop_hw_vf [2021-11-25 18:31:09,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_stop_hw_vf [2021-11-25 18:31:09,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_automaton_state_1_6 [2021-11-25 18:31:09,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_automaton_state_1_6 [2021-11-25 18:31:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_reset_hw_vf [2021-11-25 18:31:09,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_reset_hw_vf [2021-11-25 18:31:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-25 18:31:09,609 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-25 18:31:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-25 18:31:09,609 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-25 18:31:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure ixgbevf_unmap_and_free_tx_resource [2021-11-25 18:31:09,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgbevf_unmap_and_free_tx_resource [2021-11-25 18:31:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:31:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-25 18:31:09,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-25 18:31:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 18:31:09,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 18:31:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure netpoll_trap [2021-11-25 18:31:09,610 INFO L138 BoogieDeclarations]: Found implementation of procedure netpoll_trap [2021-11-25 18:31:11,113 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:31:11,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:31:11,279 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:34:08,923 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 18:34:09,066 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:34:13,578 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:34:13,578 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-25 18:34:13,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:13 BoogieIcfgContainer [2021-11-25 18:34:13,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:34:13,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:34:13,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:34:13,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:34:13,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:31:00" (1/3) ... [2021-11-25 18:34:13,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c6dd2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:13, skipping insertion in model container [2021-11-25 18:34:13,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:31:08" (2/3) ... [2021-11-25 18:34:13,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c6dd2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:13, skipping insertion in model container [2021-11-25 18:34:13,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:13" (3/3) ... [2021-11-25 18:34:13,607 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-usb-dev_drivers-net-ethernet-intel-ixgbevf-ixgbevf.cil.i [2021-11-25 18:34:13,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:34:13,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:34:13,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:34:13,730 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=FINITE_AUTOMATA, 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 [2021-11-25 18:34:13,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:34:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 2721 states, 1638 states have (on average 1.297924297924298) internal successors, (2126), 1681 states have internal predecessors, (2126), 883 states have call successors, (883), 199 states have call predecessors, (883), 198 states have return successors, (876), 872 states have call predecessors, (876), 876 states have call successors, (876) [2021-11-25 18:34:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-25 18:34:13,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:34:13,880 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:34:13,881 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:34:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:34:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash -707308528, now seen corresponding path program 1 times [2021-11-25 18:34:13,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:34:13,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927174999] [2021-11-25 18:34:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:34:13,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:34:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:34:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2021-11-25 18:34:15,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:34:15,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927174999] [2021-11-25 18:34:15,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927174999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:34:15,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:34:15,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:34:15,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937135385] [2021-11-25 18:34:15,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:34:15,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:34:15,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:34:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:34:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:34:15,941 INFO L87 Difference]: Start difference. First operand has 2721 states, 1638 states have (on average 1.297924297924298) internal successors, (2126), 1681 states have internal predecessors, (2126), 883 states have call successors, (883), 199 states have call predecessors, (883), 198 states have return successors, (876), 872 states have call predecessors, (876), 876 states have call successors, (876) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 18:34:18,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:24,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:26,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:34:31,144 INFO L93 Difference]: Finished difference Result 7968 states and 11375 transitions. [2021-11-25 18:34:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:34:31,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 310 [2021-11-25 18:34:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:34:31,264 INFO L225 Difference]: With dead ends: 7968 [2021-11-25 18:34:31,264 INFO L226 Difference]: Without dead ends: 5295 [2021-11-25 18:34:31,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:34:31,301 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 3706 mSDsluCounter, 3831 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3706 SdHoareTripleChecker+Valid, 7413 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:34:31,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3706 Valid, 7413 Invalid, 1156 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 1146 Invalid, 3 Unknown, 0 Unchecked, 14.6s Time] [2021-11-25 18:34:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5295 states. [2021-11-25 18:34:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5295 to 5293. [2021-11-25 18:34:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 3201 states have (on average 1.29553264604811) internal successors, (4147), 3284 states have internal predecessors, (4147), 1697 states have call successors, (1697), 394 states have call predecessors, (1697), 393 states have return successors, (1694), 1686 states have call predecessors, (1694), 1694 states have call successors, (1694) [2021-11-25 18:34:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 7538 transitions. [2021-11-25 18:34:31,921 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 7538 transitions. Word has length 310 [2021-11-25 18:34:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:34:31,927 INFO L470 AbstractCegarLoop]: Abstraction has 5293 states and 7538 transitions. [2021-11-25 18:34:31,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 18:34:31,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 7538 transitions. [2021-11-25 18:34:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-25 18:34:31,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:34:31,947 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:34:31,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:34:31,948 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:34:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:34:31,952 INFO L85 PathProgramCache]: Analyzing trace with hash -691802399, now seen corresponding path program 1 times [2021-11-25 18:34:31,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:34:31,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629500126] [2021-11-25 18:34:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:34:31,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:34:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:34:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2021-11-25 18:34:33,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:34:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629500126] [2021-11-25 18:34:33,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629500126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:34:33,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:34:33,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:34:33,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848072295] [2021-11-25 18:34:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:34:33,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:34:33,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:34:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:34:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:34:33,282 INFO L87 Difference]: Start difference. First operand 5293 states and 7538 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 18:34:35,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:37,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:46,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:48,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:34:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:34:52,682 INFO L93 Difference]: Finished difference Result 14384 states and 20487 transitions. [2021-11-25 18:34:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:34:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 324 [2021-11-25 18:34:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:34:53,025 INFO L225 Difference]: With dead ends: 14384 [2021-11-25 18:34:53,026 INFO L226 Difference]: Without dead ends: 9150 [2021-11-25 18:34:53,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:34:53,056 INFO L933 BasicCegarLoop]: 4514 mSDtfsCounter, 2745 mSDsluCounter, 3793 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 19 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 7758 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:34:53,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 7758 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1301 Invalid, 4 Unknown, 0 Unchecked, 18.8s Time] [2021-11-25 18:34:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9150 states. [2021-11-25 18:34:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9150 to 9141. [2021-11-25 18:34:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9141 states, 5570 states have (on average 1.2958707360861759) internal successors, (7218), 5711 states have internal predecessors, (7218), 2891 states have call successors, (2891), 680 states have call predecessors, (2891), 678 states have return successors, (2888), 2869 states have call predecessors, (2888), 2888 states have call successors, (2888) [2021-11-25 18:34:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9141 states to 9141 states and 12997 transitions. [2021-11-25 18:34:53,749 INFO L78 Accepts]: Start accepts. Automaton has 9141 states and 12997 transitions. Word has length 324 [2021-11-25 18:34:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:34:53,752 INFO L470 AbstractCegarLoop]: Abstraction has 9141 states and 12997 transitions. [2021-11-25 18:34:53,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 18:34:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 9141 states and 12997 transitions. [2021-11-25 18:34:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-25 18:34:53,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:34:53,772 INFO L514 BasicCegarLoop]: trace histogram [31, 29, 29, 29, 29, 29, 29, 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] [2021-11-25 18:34:53,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:34:53,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:34:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:34:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1340917198, now seen corresponding path program 1 times [2021-11-25 18:34:53,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:34:53,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636591482] [2021-11-25 18:34:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:34:53,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:34:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:34:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3372 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3366 trivial. 0 not checked. [2021-11-25 18:34:54,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:34:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636591482] [2021-11-25 18:34:54,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636591482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:34:54,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:34:54,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:34:54,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982112193] [2021-11-25 18:34:54,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:34:54,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:34:54,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:34:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:34:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:34:54,864 INFO L87 Difference]: Start difference. First operand 9141 states and 12997 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 18:34:56,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:05,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:07,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:09,344 INFO L93 Difference]: Finished difference Result 16843 states and 23854 transitions. [2021-11-25 18:35:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:35:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 340 [2021-11-25 18:35:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:09,426 INFO L225 Difference]: With dead ends: 16843 [2021-11-25 18:35:09,426 INFO L226 Difference]: Without dead ends: 7761 [2021-11-25 18:35:09,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:35:09,479 INFO L933 BasicCegarLoop]: 3916 mSDtfsCounter, 2720 mSDsluCounter, 3765 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 7160 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:09,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 7160 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1178 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2021-11-25 18:35:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-11-25 18:35:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 7750. [2021-11-25 18:35:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 4726 states have (on average 1.2926364790520524) internal successors, (6109), 4845 states have internal predecessors, (6109), 2407 states have call successors, (2407), 618 states have call predecessors, (2407), 615 states have return successors, (2405), 2378 states have call predecessors, (2405), 2404 states have call successors, (2405) [2021-11-25 18:35:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 10921 transitions. [2021-11-25 18:35:10,010 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 10921 transitions. Word has length 340 [2021-11-25 18:35:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:10,016 INFO L470 AbstractCegarLoop]: Abstraction has 7750 states and 10921 transitions. [2021-11-25 18:35:10,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 18:35:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 10921 transitions. [2021-11-25 18:35:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-25 18:35:10,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:10,028 INFO L514 BasicCegarLoop]: trace histogram [33, 29, 29, 29, 29, 29, 29, 4, 4, 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] [2021-11-25 18:35:10,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:35:10,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1611800547, now seen corresponding path program 1 times [2021-11-25 18:35:10,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761319012] [2021-11-25 18:35:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:10,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3519 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3519 trivial. 0 not checked. [2021-11-25 18:35:11,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761319012] [2021-11-25 18:35:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761319012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:11,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:11,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:35:11,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610487768] [2021-11-25 18:35:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:11,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:35:11,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:35:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:35:11,171 INFO L87 Difference]: Start difference. First operand 7750 states and 10921 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 18:35:13,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:22,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:24,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:28,531 INFO L93 Difference]: Finished difference Result 14884 states and 20979 transitions. [2021-11-25 18:35:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:35:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 352 [2021-11-25 18:35:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:28,667 INFO L225 Difference]: With dead ends: 14884 [2021-11-25 18:35:28,667 INFO L226 Difference]: Without dead ends: 14845 [2021-11-25 18:35:28,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:28,685 INFO L933 BasicCegarLoop]: 4128 mSDtfsCounter, 3744 mSDsluCounter, 8455 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3744 SdHoareTripleChecker+Valid, 11458 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:28,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3744 Valid, 11458 Invalid, 1698 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 1695 Invalid, 3 Unknown, 0 Unchecked, 16.9s Time] [2021-11-25 18:35:28,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14845 states. [2021-11-25 18:35:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14845 to 14843. [2021-11-25 18:35:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14843 states, 9050 states have (on average 1.2918232044198894) internal successors, (11691), 9272 states have internal predecessors, (11691), 4608 states have call successors, (4608), 1186 states have call predecessors, (4608), 1183 states have return successors, (4607), 4564 states have call predecessors, (4607), 4605 states have call successors, (4607) [2021-11-25 18:35:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14843 states to 14843 states and 20906 transitions. [2021-11-25 18:35:29,750 INFO L78 Accepts]: Start accepts. Automaton has 14843 states and 20906 transitions. Word has length 352 [2021-11-25 18:35:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:29,752 INFO L470 AbstractCegarLoop]: Abstraction has 14843 states and 20906 transitions. [2021-11-25 18:35:29,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 18:35:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 14843 states and 20906 transitions. [2021-11-25 18:35:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-25 18:35:29,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:29,773 INFO L514 BasicCegarLoop]: trace histogram [33, 29, 29, 29, 29, 29, 29, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:29,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:35:29,774 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash 27280044, now seen corresponding path program 1 times [2021-11-25 18:35:29,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:29,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95722065] [2021-11-25 18:35:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:29,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3522 trivial. 0 not checked. [2021-11-25 18:35:30,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:30,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95722065] [2021-11-25 18:35:30,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95722065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:30,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:30,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:35:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822620597] [2021-11-25 18:35:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:30,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:35:30,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:35:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:35:30,878 INFO L87 Difference]: Start difference. First operand 14843 states and 20906 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-25 18:35:33,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:41,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:45,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:47,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:35:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:50,224 INFO L93 Difference]: Finished difference Result 34141 states and 48161 transitions. [2021-11-25 18:35:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:35:50,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 371 [2021-11-25 18:35:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:50,339 INFO L225 Difference]: With dead ends: 34141 [2021-11-25 18:35:50,339 INFO L226 Difference]: Without dead ends: 19900 [2021-11-25 18:35:50,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:35:50,414 INFO L933 BasicCegarLoop]: 5585 mSDtfsCounter, 2739 mSDsluCounter, 3791 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2739 SdHoareTripleChecker+Valid, 8827 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:50,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2739 Valid, 8827 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1619 Invalid, 4 Unknown, 0 Unchecked, 18.6s Time] [2021-11-25 18:35:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19900 states. [2021-11-25 18:35:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19900 to 19887. [2021-11-25 18:35:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19887 states, 12180 states have (on average 1.2938423645320196) internal successors, (15759), 12470 states have internal predecessors, (15759), 6132 states have call successors, (6132), 1578 states have call predecessors, (6132), 1573 states have return successors, (6131), 6070 states have call predecessors, (6131), 6129 states have call successors, (6131) [2021-11-25 18:35:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19887 states to 19887 states and 28022 transitions. [2021-11-25 18:35:51,743 INFO L78 Accepts]: Start accepts. Automaton has 19887 states and 28022 transitions. Word has length 371 [2021-11-25 18:35:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:51,745 INFO L470 AbstractCegarLoop]: Abstraction has 19887 states and 28022 transitions. [2021-11-25 18:35:51,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-25 18:35:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 19887 states and 28022 transitions. [2021-11-25 18:35:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-25 18:35:51,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:51,770 INFO L514 BasicCegarLoop]: trace histogram [35, 29, 29, 29, 29, 29, 29, 9, 9, 3, 3, 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, 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] [2021-11-25 18:35:51,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:35:51,771 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1054761777, now seen corresponding path program 1 times [2021-11-25 18:35:51,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:51,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102214294] [2021-11-25 18:35:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:51,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3770 trivial. 0 not checked. [2021-11-25 18:35:53,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:53,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102214294] [2021-11-25 18:35:53,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102214294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:53,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:53,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:35:53,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758936623] [2021-11-25 18:35:53,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:53,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:35:53,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:35:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:35:53,169 INFO L87 Difference]: Start difference. First operand 19887 states and 28022 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 18:35:55,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:07,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:09,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:16,570 INFO L93 Difference]: Finished difference Result 26690 states and 38806 transitions. [2021-11-25 18:36:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:36:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 434 [2021-11-25 18:36:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:16,730 INFO L225 Difference]: With dead ends: 26690 [2021-11-25 18:36:16,730 INFO L226 Difference]: Without dead ends: 26688 [2021-11-25 18:36:16,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:36:16,747 INFO L933 BasicCegarLoop]: 5296 mSDtfsCounter, 5874 mSDsluCounter, 10322 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 428 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6242 SdHoareTripleChecker+Valid, 14281 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:16,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6242 Valid, 14281 Invalid, 2865 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [428 Valid, 2434 Invalid, 3 Unknown, 0 Unchecked, 22.6s Time] [2021-11-25 18:36:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26688 states. [2021-11-25 18:36:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26688 to 19887. [2021-11-25 18:36:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19887 states, 12180 states have (on average 1.2936781609195402) internal successors, (15757), 12470 states have internal predecessors, (15757), 6132 states have call successors, (6132), 1578 states have call predecessors, (6132), 1573 states have return successors, (6131), 6070 states have call predecessors, (6131), 6129 states have call successors, (6131) [2021-11-25 18:36:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19887 states to 19887 states and 28020 transitions. [2021-11-25 18:36:18,099 INFO L78 Accepts]: Start accepts. Automaton has 19887 states and 28020 transitions. Word has length 434 [2021-11-25 18:36:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:18,101 INFO L470 AbstractCegarLoop]: Abstraction has 19887 states and 28020 transitions. [2021-11-25 18:36:18,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-25 18:36:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 19887 states and 28020 transitions. [2021-11-25 18:36:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2021-11-25 18:36:18,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:18,200 INFO L514 BasicCegarLoop]: trace histogram [45, 33, 33, 33, 33, 33, 33, 18, 18, 10, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:18,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:36:18,200 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1899880637, now seen corresponding path program 1 times [2021-11-25 18:36:18,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:18,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099359884] [2021-11-25 18:36:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:18,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:19,153 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:19,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432653493] [2021-11-25 18:36:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:19,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:19,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:19,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:19,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:36:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:23,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 10538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:36:23,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5847 backedges. 1009 proven. 0 refuted. 0 times theorem prover too weak. 4838 trivial. 0 not checked. [2021-11-25 18:36:25,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:36:25,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099359884] [2021-11-25 18:36:25,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:25,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432653493] [2021-11-25 18:36:25,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432653493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:36:25,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:36:25,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:36:25,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084242721] [2021-11-25 18:36:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:36:25,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:36:25,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:36:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:36:25,797 INFO L87 Difference]: Start difference. First operand 19887 states and 28020 transitions. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 3 states have call successors, (117), 3 states have call predecessors, (117), 3 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) [2021-11-25 18:36:27,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:38,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:40,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:36:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:42,923 INFO L93 Difference]: Finished difference Result 45586 states and 64212 transitions. [2021-11-25 18:36:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:36:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 3 states have call successors, (117), 3 states have call predecessors, (117), 3 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) Word has length 875 [2021-11-25 18:36:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:43,100 INFO L225 Difference]: With dead ends: 45586 [2021-11-25 18:36:43,100 INFO L226 Difference]: Without dead ends: 26301 [2021-11-25 18:36:43,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 873 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:36:43,181 INFO L933 BasicCegarLoop]: 5585 mSDtfsCounter, 2736 mSDsluCounter, 3702 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 55 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 8793 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:43,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 8793 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1531 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2021-11-25 18:36:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26301 states. [2021-11-25 18:36:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26301 to 26282. [2021-11-25 18:36:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26282 states, 16160 states have (on average 1.29115099009901) internal successors, (20865), 16535 states have internal predecessors, (20865), 7996 states have call successors, (7996), 2131 states have call predecessors, (7996), 2124 states have return successors, (7997), 7909 states have call predecessors, (7997), 7993 states have call successors, (7997) [2021-11-25 18:36:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26282 states to 26282 states and 36858 transitions. [2021-11-25 18:36:44,804 INFO L78 Accepts]: Start accepts. Automaton has 26282 states and 36858 transitions. Word has length 875 [2021-11-25 18:36:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:44,807 INFO L470 AbstractCegarLoop]: Abstraction has 26282 states and 36858 transitions. [2021-11-25 18:36:44,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 3 states have call successors, (117), 3 states have call predecessors, (117), 3 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) [2021-11-25 18:36:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26282 states and 36858 transitions. [2021-11-25 18:36:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2021-11-25 18:36:45,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:45,147 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:45,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:36:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:45,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash -776628241, now seen corresponding path program 1 times [2021-11-25 18:36:45,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:45,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676393691] [2021-11-25 18:36:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:45,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:46,324 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:46,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331961227] [2021-11-25 18:36:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:46,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:46,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:46,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:36:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 10604 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:36:50,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 1200 proven. 0 refuted. 0 times theorem prover too weak. 4856 trivial. 0 not checked. [2021-11-25 18:36:52,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:36:52,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:52,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676393691] [2021-11-25 18:36:52,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:52,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331961227] [2021-11-25 18:36:52,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331961227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:36:52,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:36:52,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:36:52,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76145866] [2021-11-25 18:36:52,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:36:52,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:36:52,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:36:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:36:52,892 INFO L87 Difference]: Start difference. First operand 26282 states and 36858 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 3 states have call successors, (119), 3 states have call predecessors, (119), 3 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2021-11-25 18:36:55,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:03,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:05,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:08,245 INFO L93 Difference]: Finished difference Result 61854 states and 86366 transitions. [2021-11-25 18:37:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:37:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 3 states have call successors, (119), 3 states have call predecessors, (119), 3 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 898 [2021-11-25 18:37:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:08,451 INFO L225 Difference]: With dead ends: 61854 [2021-11-25 18:37:08,451 INFO L226 Difference]: Without dead ends: 36174 [2021-11-25 18:37:08,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:37:08,566 INFO L933 BasicCegarLoop]: 3919 mSDtfsCounter, 3628 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 30 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3628 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:08,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3628 Valid, 6454 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1075 Invalid, 3 Unknown, 0 Unchecked, 14.1s Time] [2021-11-25 18:37:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36174 states. [2021-11-25 18:37:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36174 to 36159. [2021-11-25 18:37:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36159 states, 22274 states have (on average 1.288632486306905) internal successors, (28703), 22785 states have internal predecessors, (28703), 10805 states have call successors, (10805), 3087 states have call predecessors, (10805), 3078 states have return successors, (10808), 10686 states have call predecessors, (10808), 10802 states have call successors, (10808) [2021-11-25 18:37:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36159 states to 36159 states and 50316 transitions. [2021-11-25 18:37:10,562 INFO L78 Accepts]: Start accepts. Automaton has 36159 states and 50316 transitions. Word has length 898 [2021-11-25 18:37:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:10,564 INFO L470 AbstractCegarLoop]: Abstraction has 36159 states and 50316 transitions. [2021-11-25 18:37:10,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 3 states have call successors, (119), 3 states have call predecessors, (119), 3 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2021-11-25 18:37:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 36159 states and 50316 transitions. [2021-11-25 18:37:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2021-11-25 18:37:10,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:10,717 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:10,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:10,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:37:10,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1589521522, now seen corresponding path program 1 times [2021-11-25 18:37:10,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:10,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900100444] [2021-11-25 18:37:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:10,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:11,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:11,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102327915] [2021-11-25 18:37:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:11,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:11,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:11,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:11,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:37:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:37:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 10606 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:37:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:37:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 1383 proven. 0 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2021-11-25 18:37:18,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:37:18,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:37:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900100444] [2021-11-25 18:37:18,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:37:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102327915] [2021-11-25 18:37:18,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102327915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:37:18,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:37:18,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:37:18,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231749920] [2021-11-25 18:37:18,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:37:18,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:37:18,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:37:18,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:37:18,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:37:18,918 INFO L87 Difference]: Start difference. First operand 36159 states and 50316 transitions. Second operand has 7 states, 7 states have (on average 43.0) internal successors, (301), 6 states have internal predecessors, (301), 2 states have call successors, (118), 2 states have call predecessors, (118), 3 states have return successors, (117), 3 states have call predecessors, (117), 2 states have call successors, (117) [2021-11-25 18:37:21,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:45,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:47,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:51,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:37:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:37:55,270 INFO L93 Difference]: Finished difference Result 81689 states and 115455 transitions. [2021-11-25 18:37:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:37:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 43.0) internal successors, (301), 6 states have internal predecessors, (301), 2 states have call successors, (118), 2 states have call predecessors, (118), 3 states have return successors, (117), 3 states have call predecessors, (117), 2 states have call successors, (117) Word has length 900 [2021-11-25 18:37:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:37:55,713 INFO L225 Difference]: With dead ends: 81689 [2021-11-25 18:37:55,714 INFO L226 Difference]: Without dead ends: 46132 [2021-11-25 18:37:55,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:37:55,858 INFO L933 BasicCegarLoop]: 4495 mSDtfsCounter, 761 mSDsluCounter, 25155 mSDsCounter, 0 mSdLazyCounter, 4410 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 26063 SdHoareTripleChecker+Invalid, 4416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4410 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:37:55,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 26063 Invalid, 4416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 4410 Invalid, 4 Unknown, 0 Unchecked, 34.6s Time] [2021-11-25 18:37:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46132 states. [2021-11-25 18:37:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46132 to 36215. [2021-11-25 18:37:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36215 states, 22322 states have (on average 1.2880118268972314) internal successors, (28751), 22833 states have internal predecessors, (28751), 10805 states have call successors, (10805), 3087 states have call predecessors, (10805), 3086 states have return successors, (10824), 10694 states have call predecessors, (10824), 10802 states have call successors, (10824) [2021-11-25 18:37:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36215 states to 36215 states and 50380 transitions. [2021-11-25 18:37:58,321 INFO L78 Accepts]: Start accepts. Automaton has 36215 states and 50380 transitions. Word has length 900 [2021-11-25 18:37:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:37:58,323 INFO L470 AbstractCegarLoop]: Abstraction has 36215 states and 50380 transitions. [2021-11-25 18:37:58,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.0) internal successors, (301), 6 states have internal predecessors, (301), 2 states have call successors, (118), 2 states have call predecessors, (118), 3 states have return successors, (117), 3 states have call predecessors, (117), 2 states have call successors, (117) [2021-11-25 18:37:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36215 states and 50380 transitions. [2021-11-25 18:37:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2021-11-25 18:37:58,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:37:58,424 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:37:58,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:37:58,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:58,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:37:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:37:58,641 INFO L85 PathProgramCache]: Analyzing trace with hash -158832446, now seen corresponding path program 1 times [2021-11-25 18:37:58,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:37:58,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68347662] [2021-11-25 18:37:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:58,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:37:59,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:37:59,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322598582] [2021-11-25 18:37:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:37:59,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:37:59,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:37:59,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:37:59,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:38:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:03,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 10643 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:38:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 1383 proven. 0 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2021-11-25 18:38:06,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:06,243 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68347662] [2021-11-25 18:38:06,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:38:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322598582] [2021-11-25 18:38:06,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322598582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:06,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:06,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:06,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900786278] [2021-11-25 18:38:06,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:06,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:06,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:06,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:06,249 INFO L87 Difference]: Start difference. First operand 36215 states and 50380 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 2 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2021-11-25 18:38:08,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:21,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:23,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:25,402 INFO L93 Difference]: Finished difference Result 72172 states and 100505 transitions. [2021-11-25 18:38:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 2 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 905 [2021-11-25 18:38:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:25,607 INFO L225 Difference]: With dead ends: 72172 [2021-11-25 18:38:25,607 INFO L226 Difference]: Without dead ends: 36559 [2021-11-25 18:38:25,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:38:25,940 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 83 mSDsluCounter, 7720 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 9947 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:25,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 9947 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1704 Invalid, 3 Unknown, 0 Unchecked, 17.8s Time] [2021-11-25 18:38:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36559 states. [2021-11-25 18:38:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36559 to 36231. [2021-11-25 18:38:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36231 states, 22338 states have (on average 1.287805533172173) internal successors, (28767), 22849 states have internal predecessors, (28767), 10805 states have call successors, (10805), 3087 states have call predecessors, (10805), 3086 states have return successors, (10824), 10694 states have call predecessors, (10824), 10802 states have call successors, (10824) [2021-11-25 18:38:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36231 states to 36231 states and 50396 transitions. [2021-11-25 18:38:27,773 INFO L78 Accepts]: Start accepts. Automaton has 36231 states and 50396 transitions. Word has length 905 [2021-11-25 18:38:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:27,775 INFO L470 AbstractCegarLoop]: Abstraction has 36231 states and 50396 transitions. [2021-11-25 18:38:27,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 2 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2021-11-25 18:38:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36231 states and 50396 transitions. [2021-11-25 18:38:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 907 [2021-11-25 18:38:27,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:27,874 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:27,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:28,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:28,100 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2005732684, now seen corresponding path program 1 times [2021-11-25 18:38:28,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:28,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404232534] [2021-11-25 18:38:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:28,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:28,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:38:28,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121309307] [2021-11-25 18:38:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:28,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:28,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:28,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:28,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:38:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:38:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 10670 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:38:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:38:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 1383 proven. 0 refuted. 0 times theorem prover too weak. 4675 trivial. 0 not checked. [2021-11-25 18:38:35,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:38:35,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:38:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404232534] [2021-11-25 18:38:35,629 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:38:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121309307] [2021-11-25 18:38:35,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121309307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:35,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:38:35,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:38:35,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004540830] [2021-11-25 18:38:35,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:35,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:38:35,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:38:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:38:35,632 INFO L87 Difference]: Start difference. First operand 36231 states and 50396 transitions. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 2 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2021-11-25 18:38:37,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:50,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:52,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:38:54,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:38:54,767 INFO L93 Difference]: Finished difference Result 72220 states and 100561 transitions. [2021-11-25 18:38:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:38:54,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 2 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 906 [2021-11-25 18:38:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:38:54,987 INFO L225 Difference]: With dead ends: 72220 [2021-11-25 18:38:54,987 INFO L226 Difference]: Without dead ends: 36591 [2021-11-25 18:38:55,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:38:55,111 INFO L933 BasicCegarLoop]: 3348 mSDtfsCounter, 87 mSDsluCounter, 7723 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 9950 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:38:55,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 9950 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1702 Invalid, 3 Unknown, 0 Unchecked, 17.7s Time] [2021-11-25 18:38:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36591 states. [2021-11-25 18:38:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36591 to 36247. [2021-11-25 18:38:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36247 states, 22354 states have (on average 1.2879574125436164) internal successors, (28791), 22865 states have internal predecessors, (28791), 10805 states have call successors, (10805), 3087 states have call predecessors, (10805), 3086 states have return successors, (10824), 10694 states have call predecessors, (10824), 10802 states have call successors, (10824) [2021-11-25 18:38:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36247 states to 36247 states and 50420 transitions. [2021-11-25 18:38:56,605 INFO L78 Accepts]: Start accepts. Automaton has 36247 states and 50420 transitions. Word has length 906 [2021-11-25 18:38:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:38:56,606 INFO L470 AbstractCegarLoop]: Abstraction has 36247 states and 50420 transitions. [2021-11-25 18:38:56,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 2 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2021-11-25 18:38:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 36247 states and 50420 transitions. [2021-11-25 18:38:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2021-11-25 18:38:56,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:38:56,675 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 10, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:38:56,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:38:56,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:56,876 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:38:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:38:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash 940234141, now seen corresponding path program 1 times [2021-11-25 18:38:56,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:38:56,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018916892] [2021-11-25 18:38:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:56,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:38:57,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:38:57,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003544935] [2021-11-25 18:38:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:38:57,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:38:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:38:57,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:38:57,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:39:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 10660 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:39:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 1163 proven. 0 refuted. 0 times theorem prover too weak. 4895 trivial. 0 not checked. [2021-11-25 18:39:04,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:39:04,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018916892] [2021-11-25 18:39:04,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003544935] [2021-11-25 18:39:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003544935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:39:04,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:39:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:39:04,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152528876] [2021-11-25 18:39:04,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:39:04,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:39:04,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:39:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:39:04,980 INFO L87 Difference]: Start difference. First operand 36247 states and 50420 transitions. Second operand has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 5 states have internal predecessors, (308), 3 states have call successors, (119), 2 states have call predecessors, (119), 3 states have return successors, (118), 4 states have call predecessors, (118), 3 states have call successors, (118) [2021-11-25 18:39:07,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:39:28,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:39:30,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:39:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:37,569 INFO L93 Difference]: Finished difference Result 102373 states and 147781 transitions. [2021-11-25 18:39:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:39:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 5 states have internal predecessors, (308), 3 states have call successors, (119), 2 states have call predecessors, (119), 3 states have return successors, (118), 4 states have call predecessors, (118), 3 states have call successors, (118) Word has length 909 [2021-11-25 18:39:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:37,977 INFO L225 Difference]: With dead ends: 102373 [2021-11-25 18:39:37,978 INFO L226 Difference]: Without dead ends: 66728 [2021-11-25 18:39:38,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:39:38,100 INFO L933 BasicCegarLoop]: 5098 mSDtfsCounter, 2786 mSDsluCounter, 21952 mSDsCounter, 0 mSdLazyCounter, 3713 mSolverCounterSat, 654 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 24128 SdHoareTripleChecker+Invalid, 4370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 3713 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:38,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3465 Valid, 24128 Invalid, 4370 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [654 Valid, 3713 Invalid, 3 Unknown, 0 Unchecked, 29.5s Time] [2021-11-25 18:39:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66728 states. [2021-11-25 18:39:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66728 to 36337. [2021-11-25 18:39:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 22404 states have (on average 1.2876718443135153) internal successors, (28849), 22923 states have internal predecessors, (28849), 10837 states have call successors, (10837), 3087 states have call predecessors, (10837), 3094 states have return successors, (10880), 10728 states have call predecessors, (10880), 10834 states have call successors, (10880) [2021-11-25 18:39:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 50566 transitions. [2021-11-25 18:39:40,626 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 50566 transitions. Word has length 909 [2021-11-25 18:39:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:40,628 INFO L470 AbstractCegarLoop]: Abstraction has 36337 states and 50566 transitions. [2021-11-25 18:39:40,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 5 states have internal predecessors, (308), 3 states have call successors, (119), 2 states have call predecessors, (119), 3 states have return successors, (118), 4 states have call predecessors, (118), 3 states have call successors, (118) [2021-11-25 18:39:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 50566 transitions. [2021-11-25 18:39:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2021-11-25 18:39:40,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:40,711 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:40,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 18:39:40,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:39:40,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:39:40,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:40,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1270772063, now seen corresponding path program 1 times [2021-11-25 18:39:40,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:40,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826905786] [2021-11-25 18:39:40,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:40,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:41,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:39:41,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881606621] [2021-11-25 18:39:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:41,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:41,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:41,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:39:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 10918 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:39:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 1179 proven. 0 refuted. 0 times theorem prover too weak. 4959 trivial. 0 not checked. [2021-11-25 18:39:49,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:39:49,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826905786] [2021-11-25 18:39:49,330 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:39:49,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881606621] [2021-11-25 18:39:49,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881606621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:39:49,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:39:49,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:39:49,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813397455] [2021-11-25 18:39:49,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:39:49,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:39:49,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:39:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:39:49,335 INFO L87 Difference]: Start difference. First operand 36337 states and 50566 transitions. Second operand has 7 states, 7 states have (on average 45.857142857142854) internal successors, (321), 6 states have internal predecessors, (321), 3 states have call successors, (123), 2 states have call predecessors, (123), 3 states have return successors, (122), 4 states have call predecessors, (122), 3 states have call successors, (122) [2021-11-25 18:39:51,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:11,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:13,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:15,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:21,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:23,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:32,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:40:38,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:38,980 INFO L93 Difference]: Finished difference Result 100736 states and 145319 transitions. [2021-11-25 18:40:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:40:38,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 45.857142857142854) internal successors, (321), 6 states have internal predecessors, (321), 3 states have call successors, (123), 2 states have call predecessors, (123), 3 states have return successors, (122), 4 states have call predecessors, (122), 3 states have call successors, (122) Word has length 952 [2021-11-25 18:40:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:39,264 INFO L225 Difference]: With dead ends: 100736 [2021-11-25 18:40:39,264 INFO L226 Difference]: Without dead ends: 65001 [2021-11-25 18:40:39,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 947 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:40:39,370 INFO L933 BasicCegarLoop]: 5277 mSDtfsCounter, 3074 mSDsluCounter, 28779 mSDsCounter, 0 mSdLazyCounter, 4698 mSolverCounterSat, 650 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3747 SdHoareTripleChecker+Valid, 30213 SdHoareTripleChecker+Invalid, 5354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 4698 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:39,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3747 Valid, 30213 Invalid, 5354 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [650 Valid, 4698 Invalid, 6 Unknown, 0 Unchecked, 46.0s Time] [2021-11-25 18:40:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65001 states. [2021-11-25 18:40:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65001 to 36345. [2021-11-25 18:40:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36345 states, 22412 states have (on average 1.2875691593789043) internal successors, (28857), 22923 states have internal predecessors, (28857), 10837 states have call successors, (10837), 3087 states have call predecessors, (10837), 3094 states have return successors, (10880), 10728 states have call predecessors, (10880), 10834 states have call successors, (10880) [2021-11-25 18:40:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36345 states to 36345 states and 50574 transitions. [2021-11-25 18:40:42,262 INFO L78 Accepts]: Start accepts. Automaton has 36345 states and 50574 transitions. Word has length 952 [2021-11-25 18:40:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:42,264 INFO L470 AbstractCegarLoop]: Abstraction has 36345 states and 50574 transitions. [2021-11-25 18:40:42,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.857142857142854) internal successors, (321), 6 states have internal predecessors, (321), 3 states have call successors, (123), 2 states have call predecessors, (123), 3 states have return successors, (122), 4 states have call predecessors, (122), 3 states have call successors, (122) [2021-11-25 18:40:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36345 states and 50574 transitions. [2021-11-25 18:40:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2021-11-25 18:40:42,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:42,363 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:42,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:42,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:40:42,580 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 25983636, now seen corresponding path program 1 times [2021-11-25 18:40:42,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150081501] [2021-11-25 18:40:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:42,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:43,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:40:43,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634964874] [2021-11-25 18:40:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:43,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:43,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:43,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:40:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:48,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 10513 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:40:48,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5984 backedges. 1121 proven. 0 refuted. 0 times theorem prover too weak. 4863 trivial. 0 not checked. [2021-11-25 18:40:51,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:40:51,490 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:51,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150081501] [2021-11-25 18:40:51,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:40:51,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634964874] [2021-11-25 18:40:51,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634964874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:51,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:40:51,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474377672] [2021-11-25 18:40:51,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:51,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:40:51,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:51,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:40:51,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:40:51,494 INFO L87 Difference]: Start difference. First operand 36345 states and 50574 transitions. Second operand has 8 states, 8 states have (on average 39.625) internal successors, (317), 7 states have internal predecessors, (317), 4 states have call successors, (121), 2 states have call predecessors, (121), 3 states have return successors, (120), 5 states have call predecessors, (120), 4 states have call successors, (120) [2021-11-25 18:40:53,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:41:25,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:41:27,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:41:36,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:41:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:41:40,272 INFO L93 Difference]: Finished difference Result 104607 states and 151295 transitions. [2021-11-25 18:41:40,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:41:40,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 39.625) internal successors, (317), 7 states have internal predecessors, (317), 4 states have call successors, (121), 2 states have call predecessors, (121), 3 states have return successors, (120), 5 states have call predecessors, (120), 4 states have call successors, (120) Word has length 922 [2021-11-25 18:41:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:41:40,650 INFO L225 Difference]: With dead ends: 104607 [2021-11-25 18:41:40,650 INFO L226 Difference]: Without dead ends: 68864 [2021-11-25 18:41:40,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:41:40,747 INFO L933 BasicCegarLoop]: 5332 mSDtfsCounter, 5340 mSDsluCounter, 33296 mSDsCounter, 0 mSdLazyCounter, 5286 mSolverCounterSat, 2340 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5749 SdHoareTripleChecker+Valid, 34244 SdHoareTripleChecker+Invalid, 7629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2340 IncrementalHoareTripleChecker+Valid, 5286 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:41:40,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5749 Valid, 34244 Invalid, 7629 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2340 Valid, 5286 Invalid, 3 Unknown, 0 Unchecked, 44.2s Time] [2021-11-25 18:41:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68864 states. [2021-11-25 18:41:43,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68864 to 36547. [2021-11-25 18:41:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36547 states, 22518 states have (on average 1.2865707434052758) internal successors, (28971), 23037 states have internal predecessors, (28971), 10925 states have call successors, (10925), 3087 states have call predecessors, (10925), 3102 states have return successors, (10992), 10818 states have call predecessors, (10992), 10922 states have call successors, (10992) [2021-11-25 18:41:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36547 states to 36547 states and 50888 transitions. [2021-11-25 18:41:43,345 INFO L78 Accepts]: Start accepts. Automaton has 36547 states and 50888 transitions. Word has length 922 [2021-11-25 18:41:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:41:43,346 INFO L470 AbstractCegarLoop]: Abstraction has 36547 states and 50888 transitions. [2021-11-25 18:41:43,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.625) internal successors, (317), 7 states have internal predecessors, (317), 4 states have call successors, (121), 2 states have call predecessors, (121), 3 states have return successors, (120), 5 states have call predecessors, (120), 4 states have call successors, (120) [2021-11-25 18:41:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 36547 states and 50888 transitions. [2021-11-25 18:41:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-11-25 18:41:43,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:41:43,652 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:41:43,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:41:43,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:43,857 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:41:43,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:41:43,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1938802444, now seen corresponding path program 1 times [2021-11-25 18:41:43,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:41:43,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280590906] [2021-11-25 18:41:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:43,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:41:44,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:41:44,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573751556] [2021-11-25 18:41:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:41:44,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:41:44,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:41:44,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:41:44,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:41:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:41:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 10952 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:41:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:41:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 871 proven. 0 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2021-11-25 18:41:51,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:41:51,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:41:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280590906] [2021-11-25 18:41:51,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:41:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573751556] [2021-11-25 18:41:51,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573751556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:41:51,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:41:51,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:41:51,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797826804] [2021-11-25 18:41:51,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:41:51,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:41:51,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:41:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:41:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:41:51,510 INFO L87 Difference]: Start difference. First operand 36547 states and 50888 transitions. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 4 states have internal predecessors, (328), 3 states have call successors, (124), 3 states have call predecessors, (124), 4 states have return successors, (123), 4 states have call predecessors, (123), 3 states have call successors, (123) [2021-11-25 18:41:53,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:42:14,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:42:16,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:42:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:42:22,497 INFO L93 Difference]: Finished difference Result 85517 states and 119102 transitions. [2021-11-25 18:42:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:42:22,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 4 states have internal predecessors, (328), 3 states have call successors, (124), 3 states have call predecessors, (124), 4 states have return successors, (123), 4 states have call predecessors, (123), 3 states have call successors, (123) Word has length 958 [2021-11-25 18:42:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:42:22,879 INFO L225 Difference]: With dead ends: 85517 [2021-11-25 18:42:22,880 INFO L226 Difference]: Without dead ends: 49572 [2021-11-25 18:42:22,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:42:22,978 INFO L933 BasicCegarLoop]: 5629 mSDtfsCounter, 2715 mSDsluCounter, 16889 mSDsCounter, 0 mSdLazyCounter, 3547 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2715 SdHoareTripleChecker+Valid, 20132 SdHoareTripleChecker+Invalid, 3579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3547 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:42:22,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2715 Valid, 20132 Invalid, 3579 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 3547 Invalid, 3 Unknown, 0 Unchecked, 28.8s Time] [2021-11-25 18:42:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49572 states. [2021-11-25 18:42:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49572 to 43054. [2021-11-25 18:42:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43054 states, 26568 states have (on average 1.2848915989159893) internal successors, (34137), 27176 states have internal predecessors, (34137), 12821 states have call successors, (12821), 3638 states have call predecessors, (12821), 3663 states have return successors, (12912), 12695 states have call predecessors, (12912), 12818 states have call successors, (12912) [2021-11-25 18:42:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43054 states to 43054 states and 59870 transitions. [2021-11-25 18:42:25,290 INFO L78 Accepts]: Start accepts. Automaton has 43054 states and 59870 transitions. Word has length 958 [2021-11-25 18:42:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:42:25,291 INFO L470 AbstractCegarLoop]: Abstraction has 43054 states and 59870 transitions. [2021-11-25 18:42:25,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 4 states have internal predecessors, (328), 3 states have call successors, (124), 3 states have call predecessors, (124), 4 states have return successors, (123), 4 states have call predecessors, (123), 3 states have call successors, (123) [2021-11-25 18:42:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 43054 states and 59870 transitions. [2021-11-25 18:42:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2021-11-25 18:42:25,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:42:25,359 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:42:25,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-25 18:42:25,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:42:25,561 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:42:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:42:25,562 INFO L85 PathProgramCache]: Analyzing trace with hash -482071082, now seen corresponding path program 1 times [2021-11-25 18:42:25,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:42:25,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403584957] [2021-11-25 18:42:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:25,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:42:26,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:42:26,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701464049] [2021-11-25 18:42:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:42:26,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:42:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:42:26,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:42:26,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:42:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:42:31,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 10953 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:42:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:42:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6138 backedges. 871 proven. 0 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2021-11-25 18:42:33,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:42:33,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:42:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403584957] [2021-11-25 18:42:33,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:42:33,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701464049] [2021-11-25 18:42:33,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701464049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:42:33,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:42:33,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:42:33,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358130591] [2021-11-25 18:42:33,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:42:33,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:42:33,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:42:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:42:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:42:33,569 INFO L87 Difference]: Start difference. First operand 43054 states and 59870 transitions. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 4 states have internal predecessors, (329), 3 states have call successors, (124), 3 states have call predecessors, (124), 4 states have return successors, (123), 4 states have call predecessors, (123), 3 states have call successors, (123) [2021-11-25 18:42:35,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:42:46,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:42:50,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:43:00,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:43:02,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:43:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:43:09,099 INFO L93 Difference]: Finished difference Result 98531 states and 137066 transitions. [2021-11-25 18:43:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:43:09,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 4 states have internal predecessors, (329), 3 states have call successors, (124), 3 states have call predecessors, (124), 4 states have return successors, (123), 4 states have call predecessors, (123), 3 states have call successors, (123) Word has length 959 [2021-11-25 18:43:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:43:09,477 INFO L225 Difference]: With dead ends: 98531 [2021-11-25 18:43:09,477 INFO L226 Difference]: Without dead ends: 56079 [2021-11-25 18:43:09,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:43:09,578 INFO L933 BasicCegarLoop]: 5642 mSDtfsCounter, 2780 mSDsluCounter, 16930 mSDsCounter, 0 mSdLazyCounter, 3591 mSolverCounterSat, 55 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2781 SdHoareTripleChecker+Valid, 20167 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3591 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:43:09,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2781 Valid, 20167 Invalid, 3650 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 3591 Invalid, 4 Unknown, 0 Unchecked, 33.0s Time] [2021-11-25 18:43:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56079 states. [2021-11-25 18:43:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56079 to 56050. [2021-11-25 18:43:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56050 states, 34656 states have (on average 1.2835006925207757) internal successors, (44481), 35442 states have internal predecessors, (44481), 16613 states have call successors, (16613), 4740 states have call predecessors, (16613), 4779 states have return successors, (16746), 16443 states have call predecessors, (16746), 16610 states have call successors, (16746) [2021-11-25 18:43:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56050 states to 56050 states and 77840 transitions. [2021-11-25 18:43:12,651 INFO L78 Accepts]: Start accepts. Automaton has 56050 states and 77840 transitions. Word has length 959 [2021-11-25 18:43:12,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:43:12,653 INFO L470 AbstractCegarLoop]: Abstraction has 56050 states and 77840 transitions. [2021-11-25 18:43:12,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 4 states have internal predecessors, (329), 3 states have call successors, (124), 3 states have call predecessors, (124), 4 states have return successors, (123), 4 states have call predecessors, (123), 3 states have call successors, (123) [2021-11-25 18:43:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 56050 states and 77840 transitions. [2021-11-25 18:43:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 961 [2021-11-25 18:43:12,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:43:12,753 INFO L514 BasicCegarLoop]: trace histogram [47, 33, 33, 33, 33, 33, 33, 18, 18, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:43:12,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:43:12,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe51abfa-c0a4-4c4a-a36d-e4b2695a55cc/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:43:12,953 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:43:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:43:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1883991830, now seen corresponding path program 1 times [2021-11-25 18:43:12,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:43:12,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932771533] [2021-11-25 18:43:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:43:12,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms