./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/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 cde51297e6fd0e941efee971bf40d8442d789ab4fb58443b4ef667bb6a80abb8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:25:51,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:25:51,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:25:51,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:25:51,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:25:51,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:25:51,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:25:51,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:25:51,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:25:51,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:25:51,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:25:51,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:25:51,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:25:51,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:25:51,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:25:51,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:25:51,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:25:51,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:25:51,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:25:51,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:25:51,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:25:51,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:25:51,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:25:51,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:25:51,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:25:51,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:25:51,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:25:51,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:25:51,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:25:51,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:25:51,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:25:51,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:25:51,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:25:51,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:25:51,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:25:51,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:25:51,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:25:51,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:25:51,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:25:51,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:25:51,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:25:51,665 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:25:51,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:25:51,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:25:51,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:25:51,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:25:51,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:25:51,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:25:51,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:25:51,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:25:51,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:25:51,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:25:51,714 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:25:51,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:25:51,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:25:51,714 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:25:51,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:25:51,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:25:51,715 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:25:51,715 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:25:51,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:25:51,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:25:51,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:25:51,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:25:51,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:25:51,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:25:51,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:25:51,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:25:51,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:25:51,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:25:51,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:25:51,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:25:51,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:25:51,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:25:51,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:25:51,718 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:25:51,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:25:51,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:25:51,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:25:51,719 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:25:51,719 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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cde51297e6fd0e941efee971bf40d8442d789ab4fb58443b4ef667bb6a80abb8 [2021-11-25 18:25:51,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:25:52,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:25:52,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:25:52,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:25:52,005 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:25:52,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i [2021-11-25 18:25:52,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/data/db0b69262/223b5e3506444e0eb70fc6d16471a1b2/FLAGcea392495 [2021-11-25 18:25:53,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:25:53,035 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i [2021-11-25 18:25:53,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/data/db0b69262/223b5e3506444e0eb70fc6d16471a1b2/FLAGcea392495 [2021-11-25 18:25:53,408 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/data/db0b69262/223b5e3506444e0eb70fc6d16471a1b2 [2021-11-25 18:25:53,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:25:53,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:25:53,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:25:53,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:25:53,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:25:53,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:25:53" (1/1) ... [2021-11-25 18:25:53,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58f4c58a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:53, skipping insertion in model container [2021-11-25 18:25:53,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:25:53" (1/1) ... [2021-11-25 18:25:53,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:25:53,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:25:58,290 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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i[464446,464459] [2021-11-25 18:25:58,293 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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i[464591,464604] [2021-11-25 18:25:58,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:25:58,414 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:25:58,943 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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i[464446,464459] [2021-11-25 18:25:58,944 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_6bc1a357-c580-4cf4-8d3e-7541b59c939a/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i[464591,464604] [2021-11-25 18:25:58,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:25:59,339 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:25:59,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59 WrapperNode [2021-11-25 18:25:59,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:25:59,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:25:59,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:25:59,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:25:59,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:25:59,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:25:59,881 INFO L137 Inliner]: procedures = 623, calls = 3565, calls flagged for inlining = 310, calls inlined = 274, statements flattened = 8094 [2021-11-25 18:25:59,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:25:59,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:25:59,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:25:59,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:25:59,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:25:59,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:25:59,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:25:59,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:26:00,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:26:00,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:26:00,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:26:00,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:26:00,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:26:00,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:26:00,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:26:00,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (1/1) ... [2021-11-25 18:26:00,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:26:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:00,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:26:00,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:26:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-25 18:26:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-25 18:26:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-25 18:26:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-25 18:26:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_read_phy_reg [2021-11-25 18:26:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_read_phy_reg [2021-11-25 18:26:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:26:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:26:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_force_ps [2021-11-25 18:26:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_force_ps [2021-11-25 18:26:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2021-11-25 18:26:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2021-11-25 18:26:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 18:26:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 18:26:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:26:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:26:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_del_timer [2021-11-25 18:26:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_del_timer [2021-11-25 18:26:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-25 18:26:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-25 18:26:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-25 18:26:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-25 18:26:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 18:26:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 18:26:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 18:26:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 18:26:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 18:26:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 18:26:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_irq_disable [2021-11-25 18:26:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_irq_disable [2021-11-25 18:26:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_io_resume [2021-11-25 18:26:00,342 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_io_resume [2021-11-25 18:26:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_restart_autoneg [2021-11-25 18:26:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_restart_autoneg [2021-11-25 18:26:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_close [2021-11-25 18:26:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_close [2021-11-25 18:26:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 18:26:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 18:26:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 18:26:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 18:26:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_get_tpd [2021-11-25 18:26:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_get_tpd [2021-11-25 18:26:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-25 18:26:00,345 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-25 18:26:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-25 18:26:00,345 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-25 18:26:00,346 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-25 18:26:00,346 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-25 18:26:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 18:26:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 18:26:00,347 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 18:26:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 18:26:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_free_irq [2021-11-25 18:26:00,348 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_free_irq [2021-11-25 18:26:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-25 18:26:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-25 18:26:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2021-11-25 18:26:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2021-11-25 18:26:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:26:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_106 [2021-11-25 18:26:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_106 [2021-11-25 18:26:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2021-11-25 18:26:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2021-11-25 18:26:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_shutdown [2021-11-25 18:26:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_shutdown [2021-11-25 18:26:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2021-11-25 18:26:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2021-11-25 18:26:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_check_eeprom_exist [2021-11-25 18:26:00,351 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_check_eeprom_exist [2021-11-25 18:26:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2021-11-25 18:26:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2021-11-25 18:26:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 18:26:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 18:26:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 18:26:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 18:26:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:26:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_hw_set_mac_addr [2021-11-25 18:26:00,354 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_hw_set_mac_addr [2021-11-25 18:26:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 18:26:00,354 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 18:26:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 18:26:00,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 18:26:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_get_tx_buffer [2021-11-25 18:26:00,355 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_get_tx_buffer [2021-11-25 18:26:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:26:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 18:26:00,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 18:26:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:26:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 18:26:00,356 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 18:26:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-25 18:26:00,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-25 18:26:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:26:00,356 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:26:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-25 18:26:00,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-25 18:26:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-25 18:26:00,357 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-25 18:26:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 18:26:00,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 18:26:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure pci_choose_state [2021-11-25 18:26:00,358 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_choose_state [2021-11-25 18:26:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-25 18:26:00,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-25 18:26:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-25 18:26:00,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-25 18:26:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_irq_reset [2021-11-25 18:26:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_irq_reset [2021-11-25 18:26:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-25 18:26:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-25 18:26:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-25 18:26:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-25 18:26:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_down [2021-11-25 18:26:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_down [2021-11-25 18:26:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:26:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure __atl1e_vlan_mode [2021-11-25 18:26:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __atl1e_vlan_mode [2021-11-25 18:26:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 18:26:00,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 18:26:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 18:26:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 18:26:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:26:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-25 18:26:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-25 18:26:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 18:26:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 18:26:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 18:26:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 18:26:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:26:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 18:26:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-25 18:26:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-25 18:26:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-25 18:26:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-25 18:26:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-25 18:26:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-25 18:26:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2021-11-25 18:26:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2021-11-25 18:26:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_set_multi [2021-11-25 18:26:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_set_multi [2021-11-25 18:26:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_remove [2021-11-25 18:26:00,364 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_remove [2021-11-25 18:26:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-25 18:26:00,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-25 18:26:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_atl1e_driver_exit_14_2 [2021-11-25 18:26:00,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_atl1e_driver_exit_14_2 [2021-11-25 18:26:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 18:26:00,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 18:26:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-25 18:26:00,365 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-25 18:26:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 18:26:00,365 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 18:26:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-25 18:26:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-25 18:26:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_free_ring_resources [2021-11-25 18:26:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_free_ring_resources [2021-11-25 18:26:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2021-11-25 18:26:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2021-11-25 18:26:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-25 18:26:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-25 18:26:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 18:26:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 18:26:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_validate_option [2021-11-25 18:26:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_validate_option [2021-11-25 18:26:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-25 18:26:00,367 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-25 18:26:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure writew [2021-11-25 18:26:00,368 INFO L138 BoogieDeclarations]: Found implementation of procedure writew [2021-11-25 18:26:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:26:00,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:26:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-25 18:26:00,368 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-25 18:26:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-25 18:26:00,368 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-25 18:26:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:26:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:26:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:26:00,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:26:00,369 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 18:26:00,369 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 18:26:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-25 18:26:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-25 18:26:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-25 18:26:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-25 18:26:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-25 18:26:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-25 18:26:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_clean_tx_ring [2021-11-25 18:26:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_clean_tx_ring [2021-11-25 18:26:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_mdio_lock_of_atl1e_adapter [2021-11-25 18:26:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_mdio_lock_of_atl1e_adapter [2021-11-25 18:26:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-25 18:26:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-25 18:26:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2021-11-25 18:26:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2021-11-25 18:26:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-25 18:26:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-25 18:26:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_mdio_lock_of_atl1e_adapter [2021-11-25 18:26:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_mdio_lock_of_atl1e_adapter [2021-11-25 18:26:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-25 18:26:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-25 18:26:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:26:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:26:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_resume [2021-11-25 18:26:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_resume [2021-11-25 18:26:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 18:26:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 18:26:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-25 18:26:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-25 18:26:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:26:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 18:26:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 18:26:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-25 18:26:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-25 18:26:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 18:26:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 18:26:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_tx_timeout [2021-11-25 18:26:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_tx_timeout [2021-11-25 18:26:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_114 [2021-11-25 18:26:00,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_114 [2021-11-25 18:26:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:26:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_vlan_mode [2021-11-25 18:26:00,376 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_vlan_mode [2021-11-25 18:26:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_write_phy_reg [2021-11-25 18:26:00,376 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_write_phy_reg [2021-11-25 18:26:00,376 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-11-25 18:26:00,376 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-11-25 18:26:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_102 [2021-11-25 18:26:00,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_102 [2021-11-25 18:26:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_up [2021-11-25 18:26:00,377 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_up [2021-11-25 18:26:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:26:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_phy_commit [2021-11-25 18:26:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_phy_commit [2021-11-25 18:26:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-25 18:26:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-25 18:26:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-25 18:26:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-25 18:26:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 18:26:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 18:26:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 18:26:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 18:26:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 18:26:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 18:26:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-25 18:26:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-25 18:26:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_reinit_locked [2021-11-25 18:26:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_reinit_locked [2021-11-25 18:26:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_phy_init [2021-11-25 18:26:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_phy_init [2021-11-25 18:26:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_intr [2021-11-25 18:26:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_intr [2021-11-25 18:26:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 18:26:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 18:26:00,381 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2021-11-25 18:26:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2021-11-25 18:26:00,381 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_open [2021-11-25 18:26:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_open [2021-11-25 18:26:00,381 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 18:26:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 18:26:00,381 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-25 18:26:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-25 18:26:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_irq_enable [2021-11-25 18:26:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_irq_enable [2021-11-25 18:26:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:26:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:26:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:26:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_netpoll [2021-11-25 18:26:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_netpoll [2021-11-25 18:26:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:26:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:26:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_read_eeprom [2021-11-25 18:26:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_read_eeprom [2021-11-25 18:26:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_suspend [2021-11-25 18:26:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_suspend [2021-11-25 18:26:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-25 18:26:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-25 18:26:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-25 18:26:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-25 18:26:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_nway_reset [2021-11-25 18:26:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_nway_reset [2021-11-25 18:26:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_105 [2021-11-25 18:26:00,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_105 [2021-11-25 18:26:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-25 18:26:00,385 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-25 18:26:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_request_irq [2021-11-25 18:26:00,385 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_request_irq [2021-11-25 18:26:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdrlen [2021-11-25 18:26:00,385 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdrlen [2021-11-25 18:26:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 18:26:00,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 18:26:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-25 18:26:00,386 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-25 18:26:00,386 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 18:26:00,386 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 18:26:00,386 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_get_eeprom_len [2021-11-25 18:26:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_get_eeprom_len [2021-11-25 18:26:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-25 18:26:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-25 18:26:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-25 18:26:00,387 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-25 18:26:00,387 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_reset_hw [2021-11-25 18:26:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_reset_hw [2021-11-25 18:26:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure readw [2021-11-25 18:26:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure readw [2021-11-25 18:26:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-25 18:26:00,388 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-25 18:26:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:26:00,388 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_page [2021-11-25 18:26:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_page [2021-11-25 18:26:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 18:26:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 18:26:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_get_regs_len [2021-11-25 18:26:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_get_regs_len [2021-11-25 18:26:00,389 INFO L130 BoogieDeclarations]: Found specification of procedure atl1e_clean_rx_ring [2021-11-25 18:26:00,389 INFO L138 BoogieDeclarations]: Found implementation of procedure atl1e_clean_rx_ring [2021-11-25 18:26:01,474 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:26:01,479 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:26:01,838 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:26:11,600 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 18:26:11,742 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:26:13,651 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:26:13,651 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:26:13,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:13 BoogieIcfgContainer [2021-11-25 18:26:13,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:26:13,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:26:13,666 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:26:13,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:26:13,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:25:53" (1/3) ... [2021-11-25 18:26:13,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a08bd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:13, skipping insertion in model container [2021-11-25 18:26:13,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:59" (2/3) ... [2021-11-25 18:26:13,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a08bd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:13, skipping insertion in model container [2021-11-25 18:26:13,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:13" (3/3) ... [2021-11-25 18:26:13,676 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-atheros-atl1e-atl1e.cil.i [2021-11-25 18:26:13,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:26:13,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:26:13,755 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:26:13,770 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 18:26:13,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:26:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 2192 states, 1276 states have (on average 1.2758620689655173) internal successors, (1628), 1301 states have internal predecessors, (1628), 767 states have call successors, (767), 149 states have call predecessors, (767), 148 states have return successors, (761), 759 states have call predecessors, (761), 761 states have call successors, (761) [2021-11-25 18:26:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-25 18:26:13,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:13,895 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 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] [2021-11-25 18:26:13,896 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1268115972, now seen corresponding path program 1 times [2021-11-25 18:26:13,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:13,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707475661] [2021-11-25 18:26:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:13,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2021-11-25 18:26:14,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:14,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707475661] [2021-11-25 18:26:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707475661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:14,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:14,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:26:14,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91325162] [2021-11-25 18:26:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:14,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:26:14,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:14,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:26:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:26:14,789 INFO L87 Difference]: Start difference. First operand has 2192 states, 1276 states have (on average 1.2758620689655173) internal successors, (1628), 1301 states have internal predecessors, (1628), 767 states have call successors, (767), 149 states have call predecessors, (767), 148 states have return successors, (761), 759 states have call predecessors, (761), 761 states have call successors, (761) Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 18:26:17,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:26:19,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:26:21,843 WARN L534 Checker$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 18:26:24,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:26:27,446 WARN L534 Checker$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 18:26:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:27,610 INFO L93 Difference]: Finished difference Result 5736 states and 8237 transitions. [2021-11-25 18:26:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:26:27,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 202 [2021-11-25 18:26:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:27,701 INFO L225 Difference]: With dead ends: 5736 [2021-11-25 18:26:27,701 INFO L226 Difference]: Without dead ends: 3503 [2021-11-25 18:26:27,729 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 18:26:27,733 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 1964 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 5942 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:27,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1964 Valid, 5942 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 815 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2021-11-25 18:26:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2021-11-25 18:26:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3499. [2021-11-25 18:26:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3499 states, 2059 states have (on average 1.2637202525497815) internal successors, (2602), 2101 states have internal predecessors, (2602), 1182 states have call successors, (1182), 258 states have call predecessors, (1182), 257 states have return successors, (1182), 1176 states have call predecessors, (1182), 1182 states have call successors, (1182) [2021-11-25 18:26:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3499 states to 3499 states and 4966 transitions. [2021-11-25 18:26:28,071 INFO L78 Accepts]: Start accepts. Automaton has 3499 states and 4966 transitions. Word has length 202 [2021-11-25 18:26:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:28,073 INFO L470 AbstractCegarLoop]: Abstraction has 3499 states and 4966 transitions. [2021-11-25 18:26:28,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-25 18:26:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3499 states and 4966 transitions. [2021-11-25 18:26:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-25 18:26:28,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:28,086 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:26:28,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:26:28,088 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2060626588, now seen corresponding path program 1 times [2021-11-25 18:26:28,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:28,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828114574] [2021-11-25 18:26:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:28,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:28,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:26:28,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270810243] [2021-11-25 18:26:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:28,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:28,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:28,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:26:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 3741 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:26:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2021-11-25 18:26:30,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:26:30,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828114574] [2021-11-25 18:26:30,045 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:26:30,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270810243] [2021-11-25 18:26:30,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270810243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:30,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:30,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:26:30,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014231180] [2021-11-25 18:26:30,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:30,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:26:30,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:26:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:26:30,051 INFO L87 Difference]: Start difference. First operand 3499 states and 4966 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 18:26:33,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:26:36,101 WARN L534 Checker$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 18:26:38,390 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 18:26:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:39,998 INFO L93 Difference]: Finished difference Result 9132 states and 12925 transitions. [2021-11-25 18:26:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:26:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 197 [2021-11-25 18:26:40,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:40,051 INFO L225 Difference]: With dead ends: 9132 [2021-11-25 18:26:40,051 INFO L226 Difference]: Without dead ends: 5662 [2021-11-25 18:26:40,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 195 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 18:26:40,073 INFO L933 BasicCegarLoop]: 3803 mSDtfsCounter, 2119 mSDsluCounter, 2978 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 6414 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:40,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 6414 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 963 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2021-11-25 18:26:40,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5662 states. [2021-11-25 18:26:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5662 to 5657. [2021-11-25 18:26:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5657 states, 3348 states have (on average 1.2610513739545997) internal successors, (4222), 3409 states have internal predecessors, (4222), 1873 states have call successors, (1873), 436 states have call predecessors, (1873), 435 states have return successors, (1873), 1863 states have call predecessors, (1873), 1873 states have call successors, (1873) [2021-11-25 18:26:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5657 states to 5657 states and 7968 transitions. [2021-11-25 18:26:40,417 INFO L78 Accepts]: Start accepts. Automaton has 5657 states and 7968 transitions. Word has length 197 [2021-11-25 18:26:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:40,420 INFO L470 AbstractCegarLoop]: Abstraction has 5657 states and 7968 transitions. [2021-11-25 18:26:40,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-25 18:26:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 5657 states and 7968 transitions. [2021-11-25 18:26:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-25 18:26:40,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:40,430 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 14, 14, 14, 14, 14, 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] [2021-11-25 18:26:40,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:40,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 18:26:40,657 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash -90894830, now seen corresponding path program 1 times [2021-11-25 18:26:40,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:40,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617418182] [2021-11-25 18:26:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:40,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-11-25 18:26:40,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617418182] [2021-11-25 18:26:40,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617418182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:40,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:40,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:26:40,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315750451] [2021-11-25 18:26:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:40,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:26:40,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:26:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:26:40,988 INFO L87 Difference]: Start difference. First operand 5657 states and 7968 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-25 18:26:43,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:26:45,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:26:47,820 WARN L534 Checker$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 18:26:50,342 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 18:26:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:52,021 INFO L93 Difference]: Finished difference Result 11663 states and 16396 transitions. [2021-11-25 18:26:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:26:52,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 238 [2021-11-25 18:26:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:52,078 INFO L225 Difference]: With dead ends: 11663 [2021-11-25 18:26:52,079 INFO L226 Difference]: Without dead ends: 6035 [2021-11-25 18:26:52,111 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 18:26:52,112 INFO L933 BasicCegarLoop]: 4044 mSDtfsCounter, 2057 mSDsluCounter, 3023 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 6699 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:52,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 6699 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1003 Invalid, 3 Unknown, 0 Unchecked, 10.7s Time] [2021-11-25 18:26:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6035 states. [2021-11-25 18:26:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6035 to 6030. [2021-11-25 18:26:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 3565 states have (on average 1.2569424964936886) internal successors, (4481), 3626 states have internal predecessors, (4481), 1992 states have call successors, (1992), 473 states have call predecessors, (1992), 472 states have return successors, (1992), 1982 states have call predecessors, (1992), 1992 states have call successors, (1992) [2021-11-25 18:26:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 8465 transitions. [2021-11-25 18:26:52,557 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 8465 transitions. Word has length 238 [2021-11-25 18:26:52,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:52,559 INFO L470 AbstractCegarLoop]: Abstraction has 6030 states and 8465 transitions. [2021-11-25 18:26:52,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-25 18:26:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 8465 transitions. [2021-11-25 18:26:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-25 18:26:52,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:52,570 INFO L514 BasicCegarLoop]: trace histogram [18, 14, 14, 14, 14, 14, 14, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:52,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:26:52,570 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash -906062969, now seen corresponding path program 1 times [2021-11-25 18:26:52,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:52,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975328675] [2021-11-25 18:26:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:52,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:52,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:26:52,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572427738] [2021-11-25 18:26:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:52,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:52,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:52,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:52,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:26:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 3997 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:26:54,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2021-11-25 18:26:54,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:26:54,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975328675] [2021-11-25 18:26:54,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:26:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572427738] [2021-11-25 18:26:54,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572427738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:54,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:54,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:26:54,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363046845] [2021-11-25 18:26:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:54,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:26:54,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:26:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:26:54,536 INFO L87 Difference]: Start difference. First operand 6030 states and 8465 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 18:26:57,622 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 18:27:00,318 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:02,786 WARN L534 Checker$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 18:27:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:04,515 INFO L93 Difference]: Finished difference Result 13892 states and 19504 transitions. [2021-11-25 18:27:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:27:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 244 [2021-11-25 18:27:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:04,594 INFO L225 Difference]: With dead ends: 13892 [2021-11-25 18:27:04,594 INFO L226 Difference]: Without dead ends: 7891 [2021-11-25 18:27:04,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 242 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 18:27:04,631 INFO L933 BasicCegarLoop]: 3779 mSDtfsCounter, 2114 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2114 SdHoareTripleChecker+Valid, 6382 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:04,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2114 Valid, 6382 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 959 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2021-11-25 18:27:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7891 states. [2021-11-25 18:27:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7891 to 7886. [2021-11-25 18:27:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7886 states, 4677 states have (on average 1.2589266623904212) internal successors, (5888), 4757 states have internal predecessors, (5888), 2581 states have call successors, (2581), 628 states have call predecessors, (2581), 627 states have return successors, (2581), 2567 states have call predecessors, (2581), 2581 states have call successors, (2581) [2021-11-25 18:27:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7886 states to 7886 states and 11050 transitions. [2021-11-25 18:27:05,160 INFO L78 Accepts]: Start accepts. Automaton has 7886 states and 11050 transitions. Word has length 244 [2021-11-25 18:27:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:05,161 INFO L470 AbstractCegarLoop]: Abstraction has 7886 states and 11050 transitions. [2021-11-25 18:27:05,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 18:27:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7886 states and 11050 transitions. [2021-11-25 18:27:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-25 18:27:05,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:05,173 INFO L514 BasicCegarLoop]: trace histogram [19, 14, 14, 14, 14, 14, 14, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:27:05,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:05,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:05,389 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:05,389 INFO L85 PathProgramCache]: Analyzing trace with hash 446157647, now seen corresponding path program 1 times [2021-11-25 18:27:05,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:05,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687923481] [2021-11-25 18:27:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:05,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:05,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:27:05,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882360505] [2021-11-25 18:27:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:05,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:05,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:05,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:05,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:27:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 4177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:27:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2021-11-25 18:27:07,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:27:07,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:07,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687923481] [2021-11-25 18:27:07,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:27:07,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882360505] [2021-11-25 18:27:07,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882360505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:07,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:07,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:27:07,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386808533] [2021-11-25 18:27:07,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:07,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:27:07,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:27:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:27:07,736 INFO L87 Difference]: Start difference. First operand 7886 states and 11050 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-25 18:27:09,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:12,182 WARN L534 Checker$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 18:27:13,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:15,903 WARN L534 Checker$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 18:27:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:16,869 INFO L93 Difference]: Finished difference Result 17769 states and 24866 transitions. [2021-11-25 18:27:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:27:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 285 [2021-11-25 18:27:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:16,950 INFO L225 Difference]: With dead ends: 17769 [2021-11-25 18:27:16,951 INFO L226 Difference]: Without dead ends: 9912 [2021-11-25 18:27:16,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 283 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 18:27:16,989 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 2329 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 5752 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:16,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2329 Valid, 5752 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 817 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-11-25 18:27:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9912 states. [2021-11-25 18:27:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9912 to 9907. [2021-11-25 18:27:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9907 states, 5887 states have (on average 1.2619330728724307) internal successors, (7429), 5987 states have internal predecessors, (7429), 3205 states have call successors, (3205), 815 states have call predecessors, (3205), 814 states have return successors, (3205), 3186 states have call predecessors, (3205), 3205 states have call successors, (3205) [2021-11-25 18:27:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9907 states to 9907 states and 13839 transitions. [2021-11-25 18:27:17,698 INFO L78 Accepts]: Start accepts. Automaton has 9907 states and 13839 transitions. Word has length 285 [2021-11-25 18:27:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 9907 states and 13839 transitions. [2021-11-25 18:27:17,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-25 18:27:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 9907 states and 13839 transitions. [2021-11-25 18:27:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-11-25 18:27:17,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:17,717 INFO L514 BasicCegarLoop]: trace histogram [21, 14, 14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:17,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:17,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:17,937 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2133289966, now seen corresponding path program 1 times [2021-11-25 18:27:17,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262864236] [2021-11-25 18:27:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:17,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:18,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:27:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569006404] [2021-11-25 18:27:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:18,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:18,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:18,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:27:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 4246 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:27:19,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2021-11-25 18:27:19,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:27:19,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262864236] [2021-11-25 18:27:19,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:27:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569006404] [2021-11-25 18:27:19,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569006404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:19,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:27:19,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599728232] [2021-11-25 18:27:19,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:19,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:27:19,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:27:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:27:19,825 INFO L87 Difference]: Start difference. First operand 9907 states and 13839 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 18:27:21,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:24,165 WARN L534 Checker$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 18:27:26,404 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 18:27:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:28,104 INFO L93 Difference]: Finished difference Result 23602 states and 32996 transitions. [2021-11-25 18:27:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:27:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 313 [2021-11-25 18:27:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:28,162 INFO L225 Difference]: With dead ends: 23602 [2021-11-25 18:27:28,162 INFO L226 Difference]: Without dead ends: 13724 [2021-11-25 18:27:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 311 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 18:27:28,196 INFO L933 BasicCegarLoop]: 3809 mSDtfsCounter, 2816 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 32 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2816 SdHoareTripleChecker+Valid, 5937 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2816 Valid, 5937 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 897 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2021-11-25 18:27:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13724 states. [2021-11-25 18:27:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13724 to 13717. [2021-11-25 18:27:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13717 states, 8173 states have (on average 1.2658754435335862) internal successors, (10346), 8313 states have internal predecessors, (10346), 4415 states have call successors, (4415), 1129 states have call predecessors, (4415), 1128 states have return successors, (4415), 4388 states have call predecessors, (4415), 4415 states have call successors, (4415) [2021-11-25 18:27:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 19176 transitions. [2021-11-25 18:27:28,868 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 19176 transitions. Word has length 313 [2021-11-25 18:27:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:28,869 INFO L470 AbstractCegarLoop]: Abstraction has 13717 states and 19176 transitions. [2021-11-25 18:27:28,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 18:27:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 19176 transitions. [2021-11-25 18:27:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-25 18:27:28,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:28,888 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 18:27:28,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:29,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:27:29,109 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:29,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1352127951, now seen corresponding path program 1 times [2021-11-25 18:27:29,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:29,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404045829] [2021-11-25 18:27:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:29,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:29,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:27:29,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784269559] [2021-11-25 18:27:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:29,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:29,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:29,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:27:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 4275 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:27:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-25 18:27:31,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:27:31,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404045829] [2021-11-25 18:27:31,284 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:27:31,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784269559] [2021-11-25 18:27:31,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784269559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:31,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:31,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:27:31,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501128236] [2021-11-25 18:27:31,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:31,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:27:31,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:27:31,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:31,287 INFO L87 Difference]: Start difference. First operand 13717 states and 19176 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 18:27:34,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:35,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:36,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:39,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:41,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:43,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:46,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:48,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:49,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:51,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:27:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:54,050 INFO L93 Difference]: Finished difference Result 31548 states and 44124 transitions. [2021-11-25 18:27:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:27:54,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) Word has length 334 [2021-11-25 18:27:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:54,125 INFO L225 Difference]: With dead ends: 31548 [2021-11-25 18:27:54,126 INFO L226 Difference]: Without dead ends: 17860 [2021-11-25 18:27:54,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:54,161 INFO L933 BasicCegarLoop]: 4500 mSDtfsCounter, 2404 mSDsluCounter, 13241 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 16056 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:54,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 16056 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2470 Invalid, 3 Unknown, 0 Unchecked, 22.1s Time] [2021-11-25 18:27:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-11-25 18:27:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 17852. [2021-11-25 18:27:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17852 states, 10639 states have (on average 1.264592536892565) internal successors, (13454), 10827 states have internal predecessors, (13454), 5736 states have call successors, (5736), 1475 states have call predecessors, (5736), 1476 states have return successors, (5740), 5703 states have call predecessors, (5740), 5736 states have call successors, (5740) [2021-11-25 18:27:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17852 states to 17852 states and 24930 transitions. [2021-11-25 18:27:54,994 INFO L78 Accepts]: Start accepts. Automaton has 17852 states and 24930 transitions. Word has length 334 [2021-11-25 18:27:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:54,995 INFO L470 AbstractCegarLoop]: Abstraction has 17852 states and 24930 transitions. [2021-11-25 18:27:54,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 18:27:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17852 states and 24930 transitions. [2021-11-25 18:27:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-25 18:27:55,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:55,013 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 18:27:55,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:55,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:55,229 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1421071445, now seen corresponding path program 1 times [2021-11-25 18:27:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:55,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812488930] [2021-11-25 18:27:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:55,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:55,467 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:27:55,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498053283] [2021-11-25 18:27:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:55,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:55,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:55,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:55,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:27:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:56,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 4276 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:27:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-25 18:27:57,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:27:57,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812488930] [2021-11-25 18:27:57,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:27:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498053283] [2021-11-25 18:27:57,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498053283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:57,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:57,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:27:57,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223790281] [2021-11-25 18:27:57,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:57,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:27:57,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:27:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:57,304 INFO L87 Difference]: Start difference. First operand 17852 states and 24930 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 18:28:01,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:05,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:07,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:09,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:11,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:14,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:16,231 INFO L93 Difference]: Finished difference Result 38008 states and 52989 transitions. [2021-11-25 18:28:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:28:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) Word has length 335 [2021-11-25 18:28:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:16,348 INFO L225 Difference]: With dead ends: 38008 [2021-11-25 18:28:16,348 INFO L226 Difference]: Without dead ends: 20185 [2021-11-25 18:28:16,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:28:16,412 INFO L933 BasicCegarLoop]: 3360 mSDtfsCounter, 2502 mSDsluCounter, 10342 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 35 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 12541 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:16,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2502 Valid, 12541 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1697 Invalid, 3 Unknown, 0 Unchecked, 18.2s Time] [2021-11-25 18:28:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20185 states. [2021-11-25 18:28:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20185 to 20176. [2021-11-25 18:28:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20176 states, 12020 states have (on average 1.264559068219634) internal successors, (15200), 12232 states have internal predecessors, (15200), 6438 states have call successors, (6438), 1716 states have call predecessors, (6438), 1717 states have return successors, (6442), 6400 states have call predecessors, (6442), 6438 states have call successors, (6442) [2021-11-25 18:28:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20176 states to 20176 states and 28080 transitions. [2021-11-25 18:28:18,002 INFO L78 Accepts]: Start accepts. Automaton has 20176 states and 28080 transitions. Word has length 335 [2021-11-25 18:28:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 20176 states and 28080 transitions. [2021-11-25 18:28:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (40), 3 states have call predecessors, (40), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 18:28:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 20176 states and 28080 transitions. [2021-11-25 18:28:18,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-25 18:28:18,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:18,036 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 9, 9, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:28:18,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:18,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 18:28:18,253 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1332969301, now seen corresponding path program 1 times [2021-11-25 18:28:18,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:18,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658647365] [2021-11-25 18:28:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:18,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:18,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:28:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811620609] [2021-11-25 18:28:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:18,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:18,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:18,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:18,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:28:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 4287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:28:19,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 986 trivial. 0 not checked. [2021-11-25 18:28:20,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:28:20,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:20,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658647365] [2021-11-25 18:28:20,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:28:20,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811620609] [2021-11-25 18:28:20,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811620609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:28:20,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:28:20,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:28:20,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940358736] [2021-11-25 18:28:20,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:28:20,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:28:20,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:20,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:28:20,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:28:20,669 INFO L87 Difference]: Start difference. First operand 20176 states and 28080 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-25 18:28:24,649 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 18:28:27,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:30,056 WARN L534 Checker$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 18:28:36,589 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 18:28:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:37,302 INFO L93 Difference]: Finished difference Result 42218 states and 58738 transitions. [2021-11-25 18:28:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:28:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 342 [2021-11-25 18:28:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:37,449 INFO L225 Difference]: With dead ends: 42218 [2021-11-25 18:28:37,450 INFO L226 Difference]: Without dead ends: 22071 [2021-11-25 18:28:37,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:28:37,526 INFO L933 BasicCegarLoop]: 4494 mSDtfsCounter, 2235 mSDsluCounter, 4061 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 65 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2235 SdHoareTripleChecker+Valid, 7918 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:37,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2235 Valid, 7918 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2349 Invalid, 4 Unknown, 0 Unchecked, 15.8s Time] [2021-11-25 18:28:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22071 states. [2021-11-25 18:28:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22071 to 22065. [2021-11-25 18:28:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22065 states, 13146 states have (on average 1.2639586185912064) internal successors, (16616), 13377 states have internal predecessors, (16616), 7033 states have call successors, (7033), 1884 states have call predecessors, (7033), 1885 states have return successors, (7037), 6991 states have call predecessors, (7037), 7033 states have call successors, (7037) [2021-11-25 18:28:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22065 states to 22065 states and 30686 transitions. [2021-11-25 18:28:39,001 INFO L78 Accepts]: Start accepts. Automaton has 22065 states and 30686 transitions. Word has length 342 [2021-11-25 18:28:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:39,003 INFO L470 AbstractCegarLoop]: Abstraction has 22065 states and 30686 transitions. [2021-11-25 18:28:39,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-25 18:28:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22065 states and 30686 transitions. [2021-11-25 18:28:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-25 18:28:39,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:39,027 INFO L514 BasicCegarLoop]: trace histogram [24, 14, 14, 14, 14, 14, 14, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:39,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:28:39,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:39,245 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -627661403, now seen corresponding path program 1 times [2021-11-25 18:28:39,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398997759] [2021-11-25 18:28:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:39,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:39,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:28:39,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882258941] [2021-11-25 18:28:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:39,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:39,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:39,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:28:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 4575 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:28:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2021-11-25 18:28:42,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:28:42,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:42,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398997759] [2021-11-25 18:28:42,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:28:42,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882258941] [2021-11-25 18:28:42,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882258941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:28:42,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:28:42,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:28:42,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886474125] [2021-11-25 18:28:42,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:28:42,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:28:42,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:42,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:28:42,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:28:42,703 INFO L87 Difference]: Start difference. First operand 22065 states and 30686 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (43), 4 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-25 18:28:46,493 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 18:28:50,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:28:52,738 WARN L534 Checker$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 18:28:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:58,147 INFO L93 Difference]: Finished difference Result 45960 states and 63943 transitions. [2021-11-25 18:28:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:28:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (43), 4 states have call predecessors, (43), 3 states have call successors, (43) Word has length 389 [2021-11-25 18:28:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:58,278 INFO L225 Difference]: With dead ends: 45960 [2021-11-25 18:28:58,278 INFO L226 Difference]: Without dead ends: 23924 [2021-11-25 18:28:58,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:28:58,362 INFO L933 BasicCegarLoop]: 4663 mSDtfsCounter, 2400 mSDsluCounter, 13591 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2400 SdHoareTripleChecker+Valid, 16545 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:58,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2400 Valid, 16545 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2509 Invalid, 3 Unknown, 0 Unchecked, 14.5s Time] [2021-11-25 18:28:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23924 states. [2021-11-25 18:29:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23924 to 23536. [2021-11-25 18:29:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23536 states, 14026 states have (on average 1.2645087694282047) internal successors, (17736), 14270 states have internal predecessors, (17736), 7515 states have call successors, (7515), 1993 states have call predecessors, (7515), 1994 states have return successors, (7519), 7472 states have call predecessors, (7519), 7515 states have call successors, (7519) [2021-11-25 18:29:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23536 states to 23536 states and 32770 transitions. [2021-11-25 18:29:00,318 INFO L78 Accepts]: Start accepts. Automaton has 23536 states and 32770 transitions. Word has length 389 [2021-11-25 18:29:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:00,319 INFO L470 AbstractCegarLoop]: Abstraction has 23536 states and 32770 transitions. [2021-11-25 18:29:00,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (43), 4 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-25 18:29:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 23536 states and 32770 transitions. [2021-11-25 18:29:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-25 18:29:00,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:00,344 INFO L514 BasicCegarLoop]: trace histogram [24, 14, 14, 14, 14, 14, 14, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:00,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:00,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:29:00,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1307615119, now seen corresponding path program 1 times [2021-11-25 18:29:00,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:00,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640786337] [2021-11-25 18:29:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:00,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:01,021 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:29:01,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165692415] [2021-11-25 18:29:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:01,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:01,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:01,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:01,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:29:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 4576 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:29:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2021-11-25 18:29:03,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:29:03,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640786337] [2021-11-25 18:29:03,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:29:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165692415] [2021-11-25 18:29:03,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165692415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:03,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:29:03,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:29:03,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354156366] [2021-11-25 18:29:03,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:03,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:29:03,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:29:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:29:03,770 INFO L87 Difference]: Start difference. First operand 23536 states and 32770 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (43), 4 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-25 18:29:07,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:11,777 WARN L534 Checker$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 18:29:14,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:18,894 WARN L534 Checker$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 18:29:21,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:24,103 WARN L534 Checker$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 18:29:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:24,479 INFO L93 Difference]: Finished difference Result 48917 states and 68118 transitions. [2021-11-25 18:29:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:29:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (43), 4 states have call predecessors, (43), 3 states have call successors, (43) Word has length 390 [2021-11-25 18:29:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:24,632 INFO L225 Difference]: With dead ends: 48917 [2021-11-25 18:29:24,633 INFO L226 Difference]: Without dead ends: 25410 [2021-11-25 18:29:24,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:29:24,716 INFO L933 BasicCegarLoop]: 3384 mSDtfsCounter, 2435 mSDsluCounter, 10448 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 35 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2435 SdHoareTripleChecker+Valid, 12664 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:24,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2435 Valid, 12664 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1701 Invalid, 6 Unknown, 0 Unchecked, 19.7s Time] [2021-11-25 18:29:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25410 states. [2021-11-25 18:29:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25410 to 24972. [2021-11-25 18:29:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24972 states, 14878 states have (on average 1.2652238204059685) internal successors, (18824), 15136 states have internal predecessors, (18824), 7987 states have call successors, (7987), 2105 states have call predecessors, (7987), 2106 states have return successors, (7991), 7942 states have call predecessors, (7991), 7987 states have call successors, (7991) [2021-11-25 18:29:26,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24972 states to 24972 states and 34802 transitions. [2021-11-25 18:29:26,182 INFO L78 Accepts]: Start accepts. Automaton has 24972 states and 34802 transitions. Word has length 390 [2021-11-25 18:29:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:26,183 INFO L470 AbstractCegarLoop]: Abstraction has 24972 states and 34802 transitions. [2021-11-25 18:29:26,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (45), 3 states have call predecessors, (45), 4 states have return successors, (43), 4 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-25 18:29:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 24972 states and 34802 transitions. [2021-11-25 18:29:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-11-25 18:29:26,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:26,211 INFO L514 BasicCegarLoop]: trace histogram [25, 14, 14, 14, 14, 14, 14, 12, 12, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-25 18:29:26,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:26,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:26,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1189174279, now seen corresponding path program 1 times [2021-11-25 18:29:26,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:26,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27290778] [2021-11-25 18:29:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:26,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:26,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:29:26,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890510533] [2021-11-25 18:29:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:26,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:26,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:26,637 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:26,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:29:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 5130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:29:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2021-11-25 18:29:29,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:29:29,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27290778] [2021-11-25 18:29:29,175 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:29:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890510533] [2021-11-25 18:29:29,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890510533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:29,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:29:29,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:29:29,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494724210] [2021-11-25 18:29:29,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:29,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:29:29,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:29:29,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:29:29,179 INFO L87 Difference]: Start difference. First operand 24972 states and 34802 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-25 18:29:31,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:34,641 WARN L534 Checker$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 18:29:36,981 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 18:29:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:39,372 INFO L93 Difference]: Finished difference Result 51769 states and 72164 transitions. [2021-11-25 18:29:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:29:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) Word has length 444 [2021-11-25 18:29:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:39,476 INFO L225 Difference]: With dead ends: 51769 [2021-11-25 18:29:39,476 INFO L226 Difference]: Without dead ends: 26826 [2021-11-25 18:29:39,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 442 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 18:29:39,544 INFO L933 BasicCegarLoop]: 3376 mSDtfsCounter, 2438 mSDsluCounter, 2864 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2438 SdHoareTripleChecker+Valid, 5884 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:39,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2438 Valid, 5884 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 823 Invalid, 3 Unknown, 0 Unchecked, 9.2s Time] [2021-11-25 18:29:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26826 states. [2021-11-25 18:29:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26826 to 26819. [2021-11-25 18:29:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26819 states, 15986 states have (on average 1.2659201801576379) internal successors, (20237), 16263 states have internal predecessors, (20237), 8573 states have call successors, (8573), 2258 states have call predecessors, (8573), 2259 states have return successors, (8577), 8524 states have call predecessors, (8577), 8573 states have call successors, (8577) [2021-11-25 18:29:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26819 states to 26819 states and 37387 transitions. [2021-11-25 18:29:40,840 INFO L78 Accepts]: Start accepts. Automaton has 26819 states and 37387 transitions. Word has length 444 [2021-11-25 18:29:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 26819 states and 37387 transitions. [2021-11-25 18:29:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (51), 3 states have call predecessors, (51), 3 states have call successors, (51) [2021-11-25 18:29:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 26819 states and 37387 transitions. [2021-11-25 18:29:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-25 18:29:40,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:40,901 INFO L514 BasicCegarLoop]: trace histogram [25, 16, 16, 16, 16, 16, 16, 14, 14, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:29:40,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:41,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:29:41,117 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash -404437355, now seen corresponding path program 1 times [2021-11-25 18:29:41,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:41,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968477386] [2021-11-25 18:29:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:41,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1666 trivial. 0 not checked. [2021-11-25 18:29:42,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:42,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968477386] [2021-11-25 18:29:42,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968477386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:42,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:29:42,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:29:42,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480771589] [2021-11-25 18:29:42,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:42,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:29:42,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:29:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:29:42,337 INFO L87 Difference]: Start difference. First operand 26819 states and 37387 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-25 18:29:44,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:46,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:49,870 WARN L534 Checker$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 18:29:52,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:29:55,493 WARN L534 Checker$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 18:29:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:57,423 INFO L93 Difference]: Finished difference Result 62044 states and 87973 transitions. [2021-11-25 18:29:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:29:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 478 [2021-11-25 18:29:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:57,535 INFO L225 Difference]: With dead ends: 62044 [2021-11-25 18:29:57,535 INFO L226 Difference]: Without dead ends: 35254 [2021-11-25 18:29:57,595 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 18:29:57,595 INFO L933 BasicCegarLoop]: 3248 mSDtfsCounter, 685 mSDsluCounter, 3067 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 5940 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:57,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1014 Valid, 5940 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 809 Invalid, 3 Unknown, 0 Unchecked, 14.0s Time] [2021-11-25 18:29:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35254 states. [2021-11-25 18:29:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35254 to 26819. [2021-11-25 18:29:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26819 states, 15986 states have (on average 1.2658576254222444) internal successors, (20236), 16263 states have internal predecessors, (20236), 8573 states have call successors, (8573), 2258 states have call predecessors, (8573), 2259 states have return successors, (8577), 8524 states have call predecessors, (8577), 8573 states have call successors, (8577) [2021-11-25 18:29:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26819 states to 26819 states and 37386 transitions. [2021-11-25 18:29:59,377 INFO L78 Accepts]: Start accepts. Automaton has 26819 states and 37386 transitions. Word has length 478 [2021-11-25 18:29:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:59,379 INFO L470 AbstractCegarLoop]: Abstraction has 26819 states and 37386 transitions. [2021-11-25 18:29:59,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2021-11-25 18:29:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26819 states and 37386 transitions. [2021-11-25 18:29:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-11-25 18:29:59,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:59,417 INFO L514 BasicCegarLoop]: trace histogram [26, 14, 14, 14, 14, 14, 14, 13, 13, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2021-11-25 18:29:59,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:29:59,418 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash 933877869, now seen corresponding path program 1 times [2021-11-25 18:29:59,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:59,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046921114] [2021-11-25 18:29:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:59,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:59,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:29:59,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903376548] [2021-11-25 18:29:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:59,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:59,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:59,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:30:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 5219 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:30:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 590 proven. 0 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2021-11-25 18:30:04,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:30:04,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046921114] [2021-11-25 18:30:04,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:30:04,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903376548] [2021-11-25 18:30:04,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903376548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:04,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:04,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:30:04,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803598814] [2021-11-25 18:30:04,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:04,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:30:04,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:04,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:30:04,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:30:04,637 INFO L87 Difference]: Start difference. First operand 26819 states and 37386 transitions. Second operand has 5 states, 4 states have (on average 38.25) internal successors, (153), 5 states have internal predecessors, (153), 3 states have call successors, (55), 3 states have call predecessors, (55), 4 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 18:30:08,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:10,571 WARN L534 Checker$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 18:30:15,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:18,424 WARN L534 Checker$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 18:30:21,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:21,765 INFO L93 Difference]: Finished difference Result 54697 states and 76199 transitions. [2021-11-25 18:30:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:30:21,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 38.25) internal successors, (153), 5 states have internal predecessors, (153), 3 states have call successors, (55), 3 states have call predecessors, (55), 4 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 473 [2021-11-25 18:30:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:21,880 INFO L225 Difference]: With dead ends: 54697 [2021-11-25 18:30:21,880 INFO L226 Difference]: Without dead ends: 27880 [2021-11-25 18:30:21,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:30:21,938 INFO L933 BasicCegarLoop]: 2954 mSDtfsCounter, 750 mSDsluCounter, 6475 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 8546 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:21,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 8546 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2155 Invalid, 3 Unknown, 0 Unchecked, 16.1s Time] [2021-11-25 18:30:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27880 states. [2021-11-25 18:30:23,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27880 to 27824. [2021-11-25 18:30:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27824 states, 16667 states have (on average 1.2639347213055738) internal successors, (21066), 16956 states have internal predecessors, (21066), 8825 states have call successors, (8825), 2329 states have call predecessors, (8825), 2331 states have return successors, (8831), 8767 states have call predecessors, (8831), 8825 states have call successors, (8831) [2021-11-25 18:30:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27824 states to 27824 states and 38722 transitions. [2021-11-25 18:30:23,245 INFO L78 Accepts]: Start accepts. Automaton has 27824 states and 38722 transitions. Word has length 473 [2021-11-25 18:30:23,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:23,247 INFO L470 AbstractCegarLoop]: Abstraction has 27824 states and 38722 transitions. [2021-11-25 18:30:23,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 38.25) internal successors, (153), 5 states have internal predecessors, (153), 3 states have call successors, (55), 3 states have call predecessors, (55), 4 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 18:30:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 27824 states and 38722 transitions. [2021-11-25 18:30:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-11-25 18:30:23,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:23,272 INFO L514 BasicCegarLoop]: trace histogram [25, 16, 16, 16, 16, 16, 16, 14, 14, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:30:23,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:23,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:30:23,497 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1293332774, now seen corresponding path program 1 times [2021-11-25 18:30:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:23,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880489095] [2021-11-25 18:30:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:23,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2021-11-25 18:30:24,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880489095] [2021-11-25 18:30:24,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880489095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:24,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:24,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:30:24,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894165726] [2021-11-25 18:30:24,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:24,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:30:24,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:30:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:30:24,441 INFO L87 Difference]: Start difference. First operand 27824 states and 38722 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2021-11-25 18:30:27,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:28,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:31,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:34,555 WARN L534 Checker$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 18:30:37,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:42,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:42,313 INFO L93 Difference]: Finished difference Result 81244 states and 117545 transitions. [2021-11-25 18:30:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:30:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) Word has length 499 [2021-11-25 18:30:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:42,550 INFO L225 Difference]: With dead ends: 81244 [2021-11-25 18:30:42,550 INFO L226 Difference]: Without dead ends: 53449 [2021-11-25 18:30:42,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:30:42,632 INFO L933 BasicCegarLoop]: 4659 mSDtfsCounter, 1745 mSDsluCounter, 7983 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 645 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 11756 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:42,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2309 Valid, 11756 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 1496 Invalid, 2 Unknown, 0 Unchecked, 15.8s Time] [2021-11-25 18:30:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53449 states. [2021-11-25 18:30:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53449 to 27824. [2021-11-25 18:30:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27824 states, 16667 states have (on average 1.2636947261054778) internal successors, (21062), 16956 states have internal predecessors, (21062), 8825 states have call successors, (8825), 2329 states have call predecessors, (8825), 2331 states have return successors, (8831), 8767 states have call predecessors, (8831), 8825 states have call successors, (8831) [2021-11-25 18:30:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27824 states to 27824 states and 38718 transitions. [2021-11-25 18:30:45,009 INFO L78 Accepts]: Start accepts. Automaton has 27824 states and 38718 transitions. Word has length 499 [2021-11-25 18:30:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:45,011 INFO L470 AbstractCegarLoop]: Abstraction has 27824 states and 38718 transitions. [2021-11-25 18:30:45,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 2 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (68), 2 states have call predecessors, (68), 2 states have call successors, (68) [2021-11-25 18:30:45,011 INFO L276 IsEmpty]: Start isEmpty. Operand 27824 states and 38718 transitions. [2021-11-25 18:30:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2021-11-25 18:30:45,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:45,044 INFO L514 BasicCegarLoop]: trace histogram [27, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2021-11-25 18:30:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 18:30:45,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:45,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1551554039, now seen corresponding path program 1 times [2021-11-25 18:30:45,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:45,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055799750] [2021-11-25 18:30:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:45,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 1794 trivial. 0 not checked. [2021-11-25 18:30:45,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:45,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055799750] [2021-11-25 18:30:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055799750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:45,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:45,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:45,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820076928] [2021-11-25 18:30:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:45,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:45,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:45,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:45,711 INFO L87 Difference]: Start difference. First operand 27824 states and 38718 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 18:30:48,796 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 18:30:51,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:30:54,887 WARN L534 Checker$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 18:31:00,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:01,249 INFO L93 Difference]: Finished difference Result 83073 states and 115581 transitions. [2021-11-25 18:31:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 491 [2021-11-25 18:31:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:01,509 INFO L225 Difference]: With dead ends: 83073 [2021-11-25 18:31:01,509 INFO L226 Difference]: Without dead ends: 55278 [2021-11-25 18:31:01,747 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 18:31:01,751 INFO L933 BasicCegarLoop]: 4742 mSDtfsCounter, 2807 mSDsluCounter, 3066 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 7434 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:01,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2807 Valid, 7434 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1031 Invalid, 4 Unknown, 0 Unchecked, 13.5s Time] [2021-11-25 18:31:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55278 states. [2021-11-25 18:31:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55278 to 55212. [2021-11-25 18:31:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55212 states, 33060 states have (on average 1.2627646702964308) internal successors, (41747), 33691 states have internal predecessors, (41747), 17511 states have call successors, (17511), 4636 states have call predecessors, (17511), 4640 states have return successors, (17523), 17339 states have call predecessors, (17523), 17511 states have call successors, (17523) [2021-11-25 18:31:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55212 states to 55212 states and 76781 transitions. [2021-11-25 18:31:05,084 INFO L78 Accepts]: Start accepts. Automaton has 55212 states and 76781 transitions. Word has length 491 [2021-11-25 18:31:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:05,085 INFO L470 AbstractCegarLoop]: Abstraction has 55212 states and 76781 transitions. [2021-11-25 18:31:05,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-25 18:31:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55212 states and 76781 transitions. [2021-11-25 18:31:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-25 18:31:05,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:05,143 INFO L514 BasicCegarLoop]: trace histogram [24, 16, 16, 16, 16, 16, 16, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:05,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 18:31:05,143 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 280930331, now seen corresponding path program 1 times [2021-11-25 18:31:05,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:05,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188275757] [2021-11-25 18:31:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:05,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:05,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:31:05,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480983282] [2021-11-25 18:31:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:05,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:05,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:31:05,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:31:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 7813 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:31:08,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1569 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 1455 trivial. 0 not checked. [2021-11-25 18:31:09,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:09,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188275757] [2021-11-25 18:31:09,603 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:31:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480983282] [2021-11-25 18:31:09,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480983282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:09,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:09,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:31:09,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937884431] [2021-11-25 18:31:09,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:09,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:31:09,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:09,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:31:09,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:31:09,607 INFO L87 Difference]: Start difference. First operand 55212 states and 76781 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 2 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2021-11-25 18:31:13,490 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 18:31:16,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:20,198 WARN L534 Checker$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 18:31:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:31:23,203 INFO L93 Difference]: Finished difference Result 110731 states and 154332 transitions. [2021-11-25 18:31:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:31:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 2 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 517 [2021-11-25 18:31:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:31:23,578 INFO L225 Difference]: With dead ends: 110731 [2021-11-25 18:31:23,579 INFO L226 Difference]: Without dead ends: 55548 [2021-11-25 18:31:23,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 515 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 18:31:23,797 INFO L933 BasicCegarLoop]: 2696 mSDtfsCounter, 11 mSDsluCounter, 3060 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 5377 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:31:23,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 5377 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 764 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2021-11-25 18:31:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55548 states. [2021-11-25 18:31:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55548 to 55254. [2021-11-25 18:31:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55254 states, 33102 states have (on average 1.262431273034862) internal successors, (41789), 33733 states have internal predecessors, (41789), 17511 states have call successors, (17511), 4636 states have call predecessors, (17511), 4640 states have return successors, (17523), 17339 states have call predecessors, (17523), 17511 states have call successors, (17523) [2021-11-25 18:31:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55254 states to 55254 states and 76823 transitions. [2021-11-25 18:31:27,330 INFO L78 Accepts]: Start accepts. Automaton has 55254 states and 76823 transitions. Word has length 517 [2021-11-25 18:31:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:31:27,331 INFO L470 AbstractCegarLoop]: Abstraction has 55254 states and 76823 transitions. [2021-11-25 18:31:27,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 2 states have call successors, (78), 2 states have call predecessors, (78), 2 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2021-11-25 18:31:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 55254 states and 76823 transitions. [2021-11-25 18:31:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-11-25 18:31:27,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:31:27,387 INFO L514 BasicCegarLoop]: trace histogram [24, 16, 16, 16, 16, 16, 16, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:31:27,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:31:27,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:27,589 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:31:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:31:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash -554607394, now seen corresponding path program 1 times [2021-11-25 18:31:27,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:31:27,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084881106] [2021-11-25 18:31:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:27,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:31:28,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:31:28,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779880330] [2021-11-25 18:31:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:31:28,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:31:28,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:31:28,109 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:31:28,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:31:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:31:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 7835 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:31:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:31:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2021-11-25 18:31:32,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:31:32,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:31:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084881106] [2021-11-25 18:31:32,321 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:31:32,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779880330] [2021-11-25 18:31:32,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779880330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:31:32,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:31:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:31:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393371329] [2021-11-25 18:31:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:31:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:31:32,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:31:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:31:32,324 INFO L87 Difference]: Start difference. First operand 55254 states and 76823 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2021-11-25 18:31:36,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:38,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:42,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:45,922 WARN L534 Checker$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 18:31:53,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:55,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:31:56,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:32:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:00,359 INFO L93 Difference]: Finished difference Result 141850 states and 203314 transitions. [2021-11-25 18:32:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:32:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 522 [2021-11-25 18:32:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:00,904 INFO L225 Difference]: With dead ends: 141850 [2021-11-25 18:32:00,904 INFO L226 Difference]: Without dead ends: 88619 [2021-11-25 18:32:01,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:32:01,076 INFO L933 BasicCegarLoop]: 4049 mSDtfsCounter, 1788 mSDsluCounter, 7643 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 550 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 10803 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:01,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2080 Valid, 10803 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 1408 Invalid, 4 Unknown, 0 Unchecked, 23.2s Time] [2021-11-25 18:32:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88619 states. [2021-11-25 18:32:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88619 to 55256. [2021-11-25 18:32:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55256 states, 33104 states have (on average 1.2624154180763654) internal successors, (41791), 33735 states have internal predecessors, (41791), 17511 states have call successors, (17511), 4636 states have call predecessors, (17511), 4640 states have return successors, (17523), 17339 states have call predecessors, (17523), 17511 states have call successors, (17523) [2021-11-25 18:32:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55256 states to 55256 states and 76825 transitions. [2021-11-25 18:32:05,581 INFO L78 Accepts]: Start accepts. Automaton has 55256 states and 76825 transitions. Word has length 522 [2021-11-25 18:32:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:05,582 INFO L470 AbstractCegarLoop]: Abstraction has 55256 states and 76825 transitions. [2021-11-25 18:32:05,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2021-11-25 18:32:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 55256 states and 76825 transitions. [2021-11-25 18:32:05,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-25 18:32:05,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:05,625 INFO L514 BasicCegarLoop]: trace histogram [28, 15, 15, 14, 14, 14, 14, 14, 14, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:05,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 18:32:05,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:32:05,826 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash 81843802, now seen corresponding path program 1 times [2021-11-25 18:32:05,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:05,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566599448] [2021-11-25 18:32:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:05,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1958 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1930 trivial. 0 not checked. [2021-11-25 18:32:06,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566599448] [2021-11-25 18:32:06,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566599448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:32:06,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:32:06,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:32:06,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29078227] [2021-11-25 18:32:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:32:06,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:32:06,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:32:06,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:32:06,226 INFO L87 Difference]: Start difference. First operand 55256 states and 76825 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-25 18:32:09,309 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 18:32:12,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:32:15,142 WARN L534 Checker$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 18:32:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:18,413 INFO L93 Difference]: Finished difference Result 110850 states and 153864 transitions. [2021-11-25 18:32:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:32:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 506 [2021-11-25 18:32:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:18,981 INFO L225 Difference]: With dead ends: 110850 [2021-11-25 18:32:18,988 INFO L226 Difference]: Without dead ends: 55623 [2021-11-25 18:32:19,206 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 18:32:19,207 INFO L933 BasicCegarLoop]: 2690 mSDtfsCounter, 77 mSDsluCounter, 3035 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5354 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:19,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 5354 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 776 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2021-11-25 18:32:19,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55623 states. [2021-11-25 18:32:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55623 to 55623. [2021-11-25 18:32:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55623 states, 33340 states have (on average 1.2607078584283142) internal successors, (42032), 33971 states have internal predecessors, (42032), 17517 states have call successors, (17517), 4761 states have call predecessors, (17517), 4765 states have return successors, (17529), 17345 states have call predecessors, (17529), 17517 states have call successors, (17529) [2021-11-25 18:32:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55623 states to 55623 states and 77078 transitions. [2021-11-25 18:32:22,593 INFO L78 Accepts]: Start accepts. Automaton has 55623 states and 77078 transitions. Word has length 506 [2021-11-25 18:32:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:22,593 INFO L470 AbstractCegarLoop]: Abstraction has 55623 states and 77078 transitions. [2021-11-25 18:32:22,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2021-11-25 18:32:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 55623 states and 77078 transitions. [2021-11-25 18:32:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-25 18:32:22,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:22,632 INFO L514 BasicCegarLoop]: trace histogram [28, 15, 15, 14, 14, 14, 14, 14, 14, 9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:22,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 18:32:22,633 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash -540393062, now seen corresponding path program 2 times [2021-11-25 18:32:22,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:22,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827001487] [2021-11-25 18:32:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:22,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1958 backedges. 158 proven. 69 refuted. 0 times theorem prover too weak. 1731 trivial. 0 not checked. [2021-11-25 18:32:23,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827001487] [2021-11-25 18:32:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827001487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422694853] [2021-11-25 18:32:23,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:32:23,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:23,280 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc1a357-c580-4cf4-8d3e-7541b59c939a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:32:25,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 18:32:25,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:32:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 18:32:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates...