./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-3com-typhoon.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P --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 a82ce6420bb3a33f545de9c61d1c9b088648b3b20e86d3c3faffeeee8d72c08d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:50:42,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:50:42,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:50:42,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:50:42,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:50:42,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:50:42,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:50:42,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:50:42,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:50:42,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:50:42,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:50:42,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:50:42,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:50:42,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:50:42,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:50:42,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:50:42,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:50:42,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:50:42,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:50:42,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:50:42,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:50:42,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:50:42,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:50:42,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:50:42,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:50:42,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:50:42,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:50:42,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:50:42,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:50:43,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:50:43,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:50:43,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:50:43,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:50:43,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:50:43,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:50:43,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:50:43,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:50:43,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:50:43,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:50:43,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:50:43,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:50:43,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:50:43,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:50:43,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:50:43,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:50:43,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:50:43,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:50:43,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:50:43,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:50:43,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:50:43,066 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:50:43,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:50:43,067 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:50:43,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:50:43,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:50:43,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:50:43,067 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:50:43,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:50:43,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:50:43,068 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:50:43,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:50:43,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:50:43,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:50:43,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:50:43,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:50:43,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:50:43,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:50:43,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:50:43,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:50:43,071 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:50:43,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:50:43,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:50:43,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:50:43,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:50:43,072 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_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a82ce6420bb3a33f545de9c61d1c9b088648b3b20e86d3c3faffeeee8d72c08d [2021-11-20 23:50:43,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:50:43,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:50:43,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:50:43,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:50:43,318 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:50:43,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i [2021-11-20 23:50:43,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/data/a0134431d/0a6681fea3e34fae88ac05afdd799ed8/FLAG51068608e [2021-11-20 23:50:44,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:50:44,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i [2021-11-20 23:50:44,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/data/a0134431d/0a6681fea3e34fae88ac05afdd799ed8/FLAG51068608e [2021-11-20 23:50:44,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/data/a0134431d/0a6681fea3e34fae88ac05afdd799ed8 [2021-11-20 23:50:44,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:50:44,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:50:44,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:50:44,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:50:44,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:50:44,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:50:44" (1/1) ... [2021-11-20 23:50:44,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d574ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:44, skipping insertion in model container [2021-11-20 23:50:44,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:50:44" (1/1) ... [2021-11-20 23:50:44,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:50:44,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:50:48,111 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_1d0a40f0-bf26-4669-9a88-54ca5f539330/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i[342349,342362] [2021-11-20 23:50:48,114 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_1d0a40f0-bf26-4669-9a88-54ca5f539330/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i[342494,342507] [2021-11-20 23:50:48,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:50:48,213 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:50:48,710 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_1d0a40f0-bf26-4669-9a88-54ca5f539330/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i[342349,342362] [2021-11-20 23:50:48,711 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_1d0a40f0-bf26-4669-9a88-54ca5f539330/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i[342494,342507] [2021-11-20 23:50:48,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:50:48,978 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:50:48,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48 WrapperNode [2021-11-20 23:50:48,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:50:48,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:50:48,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:50:48,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:50:48,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,360 INFO L137 Inliner]: procedures = 455, calls = 2192, calls flagged for inlining = 223, calls inlined = 189, statements flattened = 5082 [2021-11-20 23:50:49,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:50:49,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:50:49,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:50:49,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:50:49,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:50:49,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:50:49,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:50:49,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:50:49,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (1/1) ... [2021-11-20 23:50:49,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:50:49,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:50:49,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:50:49,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:50:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-20 23:50:49,723 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-20 23:50:49,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:50:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:50:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2021-11-20 23:50:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2021-11-20 23:50:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-20 23:50:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-20 23:50:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:50:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:50:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-20 23:50:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-20 23:50:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_wakeup [2021-11-20 23:50:49,726 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_wakeup [2021-11-20 23:50:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_wait_status [2021-11-20 23:50:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_wait_status [2021-11-20 23:50:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_set_rx_mode [2021-11-20 23:50:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_set_rx_mode [2021-11-20 23:50:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-20 23:50:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-20 23:50:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:50:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:50:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-11-20 23:50:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-11-20 23:50:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-20 23:50:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-20 23:50:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 23:50:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-20 23:50:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-20 23:50:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-20 23:50:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-20 23:50:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-20 23:50:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-20 23:50:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-11-20 23:50:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-11-20 23:50:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-20 23:50:49,730 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-20 23:50:49,730 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:50:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:50:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:50:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:50:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-20 23:50:49,731 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-20 23:50:49,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:50:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_clean_tx [2021-11-20 23:50:49,732 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_clean_tx [2021-11-20 23:50:49,732 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_stop_runtime [2021-11-20 23:50:49,733 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_stop_runtime [2021-11-20 23:50:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:50:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:50:49,734 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_resume [2021-11-20 23:50:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_resume [2021-11-20 23:50:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_inc_rxfree_index [2021-11-20 23:50:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_inc_rxfree_index [2021-11-20 23:50:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:50:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_remove_one [2021-11-20 23:50:49,736 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_remove_one [2021-11-20 23:50:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-20 23:50:49,737 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-20 23:50:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:50:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-20 23:50:49,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-20 23:50:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:50:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-20 23:50:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-20 23:50:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:50:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:50:49,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-20 23:50:49,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-20 23:50:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-20 23:50:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-20 23:50:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 23:50:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 23:50:49,739 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-20 23:50:49,739 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-20 23:50:49,740 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-20 23:50:49,740 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-20 23:50:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-20 23:50:49,741 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-20 23:50:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_close [2021-11-20 23:50:49,741 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_close [2021-11-20 23:50:49,741 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_tx_timeout [2021-11-20 23:50:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_tx_timeout [2021-11-20 23:50:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_alloc_rx_skb [2021-11-20 23:50:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_alloc_rx_skb [2021-11-20 23:50:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_issue_command [2021-11-20 23:50:49,742 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_issue_command [2021-11-20 23:50:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:50:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-20 23:50:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-20 23:50:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-20 23:50:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-20 23:50:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:50:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_process_response [2021-11-20 23:50:49,745 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_process_response [2021-11-20 23:50:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-20 23:50:49,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-20 23:50:49,745 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-20 23:50:49,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-20 23:50:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:50:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:50:49,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:50:49,746 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-20 23:50:49,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-20 23:50:49,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-20 23:50:49,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-20 23:50:49,747 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2021-11-20 23:50:49,747 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2021-11-20 23:50:49,748 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_num_free_tx [2021-11-20 23:50:49,749 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_num_free_tx [2021-11-20 23:50:49,751 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-20 23:50:49,751 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-20 23:50:49,751 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_reset [2021-11-20 23:50:49,751 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_reset [2021-11-20 23:50:49,751 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-20 23:50:49,752 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-20 23:50:49,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-20 23:50:49,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-20 23:50:49,753 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_inc_cmd_index [2021-11-20 23:50:49,759 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_inc_cmd_index [2021-11-20 23:50:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:50:49,759 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:50:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_fill_free_ring [2021-11-20 23:50:49,759 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_fill_free_ring [2021-11-20 23:50:49,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:50:49,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:50:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-20 23:50:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-20 23:50:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-20 23:50:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-20 23:50:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:50:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:50:49,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:50:49,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:50:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-20 23:50:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-20 23:50:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2021-11-20 23:50:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2021-11-20 23:50:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:50:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:50:49,761 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-20 23:50:49,761 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-20 23:50:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-20 23:50:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-20 23:50:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_wait_interrupt [2021-11-20 23:50:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_wait_interrupt [2021-11-20 23:50:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:50:49,762 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 23:50:49,762 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 23:50:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:50:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure pci_clear_mwi [2021-11-20 23:50:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_clear_mwi [2021-11-20 23:50:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:50:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_boot_3XP [2021-11-20 23:50:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_boot_3XP [2021-11-20 23:50:49,763 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-20 23:50:49,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-20 23:50:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:50:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:50:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-20 23:50:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-20 23:50:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-20 23:50:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-20 23:50:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-20 23:50:49,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-20 23:50:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure pci_restore_state [2021-11-20 23:50:49,765 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_restore_state [2021-11-20 23:50:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-20 23:50:49,765 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-20 23:50:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-20 23:50:49,765 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-20 23:50:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_free_rx_rings [2021-11-20 23:50:49,765 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_free_rx_rings [2021-11-20 23:50:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:50:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:50:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_do_get_stats [2021-11-20 23:50:49,766 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_do_get_stats [2021-11-20 23:50:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_num_free [2021-11-20 23:50:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_num_free [2021-11-20 23:50:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_sleep [2021-11-20 23:50:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_sleep [2021-11-20 23:50:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:50:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:50:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:50:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_84 [2021-11-20 23:50:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_84 [2021-11-20 23:50:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_init_rings [2021-11-20 23:50:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_init_rings [2021-11-20 23:50:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 23:50:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 23:50:49,770 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_open [2021-11-20 23:50:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_open [2021-11-20 23:50:49,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-20 23:50:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-20 23:50:49,770 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_start_runtime [2021-11-20 23:50:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_start_runtime [2021-11-20 23:50:49,770 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-20 23:50:49,770 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-20 23:50:49,771 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-20 23:50:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-20 23:50:49,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:50:49,771 INFO L130 BoogieDeclarations]: Found specification of procedure typhoon_inc_index [2021-11-20 23:50:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure typhoon_inc_index [2021-11-20 23:50:49,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-20 23:50:49,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-20 23:50:50,810 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:50:50,822 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:50:50,969 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:51:03,191 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-20 23:51:03,322 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:51:04,603 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:51:04,603 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:51:04,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:51:04 BoogieIcfgContainer [2021-11-20 23:51:04,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:51:04,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:51:04,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:51:04,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:51:04,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:50:44" (1/3) ... [2021-11-20 23:51:04,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262feead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:51:04, skipping insertion in model container [2021-11-20 23:51:04,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:50:48" (2/3) ... [2021-11-20 23:51:04,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262feead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:51:04, skipping insertion in model container [2021-11-20 23:51:04,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:51:04" (3/3) ... [2021-11-20 23:51:04,621 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-ethernet-3com-typhoon.cil.i [2021-11-20 23:51:04,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:51:04,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:51:04,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:51:04,728 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 [2021-11-20 23:51:04,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:51:04,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 1325 states, 759 states have (on average 1.2990777338603425) internal successors, (986), 781 states have internal predecessors, (986), 472 states have call successors, (472), 94 states have call predecessors, (472), 93 states have return successors, (467), 461 states have call predecessors, (467), 467 states have call successors, (467) [2021-11-20 23:51:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 23:51:04,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:04,839 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:04,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1286218261, now seen corresponding path program 1 times [2021-11-20 23:51:04,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:04,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959327369] [2021-11-20 23:51:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:04,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-20 23:51:05,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:05,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959327369] [2021-11-20 23:51:05,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959327369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:51:05,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:51:05,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:51:05,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857186988] [2021-11-20 23:51:05,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:51:05,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:51:05,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:51:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:51:05,761 INFO L87 Difference]: Start difference. First operand has 1325 states, 759 states have (on average 1.2990777338603425) internal successors, (986), 781 states have internal predecessors, (986), 472 states have call successors, (472), 94 states have call predecessors, (472), 93 states have return successors, (467), 461 states have call predecessors, (467), 467 states have call successors, (467) Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-20 23:51:08,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:10,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:13,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:13,350 INFO L93 Difference]: Finished difference Result 3445 states and 5022 transitions. [2021-11-20 23:51:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:51:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 167 [2021-11-20 23:51:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:13,396 INFO L225 Difference]: With dead ends: 3445 [2021-11-20 23:51:13,397 INFO L226 Difference]: Without dead ends: 2080 [2021-11-20 23:51:13,415 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 [2021-11-20 23:51:13,419 INFO L933 BasicCegarLoop]: 1977 mSDtfsCounter, 1158 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:13,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 3625 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 524 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 23:51:13,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-11-20 23:51:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2077. [2021-11-20 23:51:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 1221 states have (on average 1.294021294021294) internal successors, (1580), 1254 states have internal predecessors, (1580), 700 states have call successors, (700), 155 states have call predecessors, (700), 155 states have return successors, (700), 691 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-20 23:51:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 2980 transitions. [2021-11-20 23:51:13,789 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 2980 transitions. Word has length 167 [2021-11-20 23:51:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:13,794 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 2980 transitions. [2021-11-20 23:51:13,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-20 23:51:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 2980 transitions. [2021-11-20 23:51:13,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 23:51:13,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:13,816 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:13,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:51:13,817 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:13,819 INFO L85 PathProgramCache]: Analyzing trace with hash -139562806, now seen corresponding path program 1 times [2021-11-20 23:51:13,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:13,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477065858] [2021-11-20 23:51:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:13,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-20 23:51:14,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:14,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477065858] [2021-11-20 23:51:14,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477065858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:51:14,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:51:14,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:51:14,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263131051] [2021-11-20 23:51:14,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:51:14,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:51:14,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:14,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:51:14,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:51:14,157 INFO L87 Difference]: Start difference. First operand 2077 states and 2980 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 23:51:16,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:19,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:21,058 INFO L93 Difference]: Finished difference Result 5279 states and 7547 transitions. [2021-11-20 23:51:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:51:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 184 [2021-11-20 23:51:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:21,101 INFO L225 Difference]: With dead ends: 5279 [2021-11-20 23:51:21,101 INFO L226 Difference]: Without dead ends: 3219 [2021-11-20 23:51:21,118 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 [2021-11-20 23:51:21,119 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 1495 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 3570 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:21,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 3570 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 498 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 23:51:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-11-20 23:51:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3214. [2021-11-20 23:51:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 1889 states have (on average 1.2826892535733192) internal successors, (2423), 1943 states have internal predecessors, (2423), 1077 states have call successors, (1077), 249 states have call predecessors, (1077), 247 states have return successors, (1078), 1058 states have call predecessors, (1078), 1077 states have call successors, (1078) [2021-11-20 23:51:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 4578 transitions. [2021-11-20 23:51:21,370 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 4578 transitions. Word has length 184 [2021-11-20 23:51:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:21,371 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 4578 transitions. [2021-11-20 23:51:21,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 23:51:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 4578 transitions. [2021-11-20 23:51:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 23:51:21,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:21,381 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:21,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:51:21,381 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 650022265, now seen corresponding path program 1 times [2021-11-20 23:51:21,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:21,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707033575] [2021-11-20 23:51:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:21,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-11-20 23:51:21,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:21,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707033575] [2021-11-20 23:51:21,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707033575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:51:21,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:51:21,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:51:21,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109262821] [2021-11-20 23:51:21,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:51:21,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:51:21,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:51:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:51:21,831 INFO L87 Difference]: Start difference. First operand 3214 states and 4578 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-20 23:51:24,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:27,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:29,453 INFO L93 Difference]: Finished difference Result 7316 states and 10420 transitions. [2021-11-20 23:51:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:51:29,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 210 [2021-11-20 23:51:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:29,499 INFO L225 Difference]: With dead ends: 7316 [2021-11-20 23:51:29,499 INFO L226 Difference]: Without dead ends: 4119 [2021-11-20 23:51:29,522 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 [2021-11-20 23:51:29,523 INFO L933 BasicCegarLoop]: 2581 mSDtfsCounter, 1112 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:29,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 4171 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-11-20 23:51:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-11-20 23:51:29,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 4114. [2021-11-20 23:51:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 2437 states have (on average 1.2810832991382848) internal successors, (3122), 2504 states have internal predecessors, (3122), 1355 states have call successors, (1355), 324 states have call predecessors, (1355), 321 states have return successors, (1356), 1331 states have call predecessors, (1356), 1355 states have call successors, (1356) [2021-11-20 23:51:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 5833 transitions. [2021-11-20 23:51:29,773 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 5833 transitions. Word has length 210 [2021-11-20 23:51:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 4114 states and 5833 transitions. [2021-11-20 23:51:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-20 23:51:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 5833 transitions. [2021-11-20 23:51:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-20 23:51:29,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:29,784 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1] [2021-11-20 23:51:29,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:51:29,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 230932217, now seen corresponding path program 1 times [2021-11-20 23:51:29,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:29,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115038786] [2021-11-20 23:51:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:29,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2021-11-20 23:51:30,083 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115038786] [2021-11-20 23:51:30,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115038786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:51:30,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:51:30,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:51:30,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45140612] [2021-11-20 23:51:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:51:30,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:51:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:51:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:51:30,087 INFO L87 Difference]: Start difference. First operand 4114 states and 5833 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 23:51:33,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:35,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:37,478 INFO L93 Difference]: Finished difference Result 8243 states and 11788 transitions. [2021-11-20 23:51:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:51:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 269 [2021-11-20 23:51:37,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:37,529 INFO L225 Difference]: With dead ends: 8243 [2021-11-20 23:51:37,529 INFO L226 Difference]: Without dead ends: 4146 [2021-11-20 23:51:37,559 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 [2021-11-20 23:51:37,564 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 5 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:37,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 3256 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 471 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 23:51:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2021-11-20 23:51:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4118. [2021-11-20 23:51:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4118 states, 2441 states have (on average 1.2806226956165505) internal successors, (3126), 2508 states have internal predecessors, (3126), 1355 states have call successors, (1355), 324 states have call predecessors, (1355), 321 states have return successors, (1356), 1331 states have call predecessors, (1356), 1355 states have call successors, (1356) [2021-11-20 23:51:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 5837 transitions. [2021-11-20 23:51:37,889 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 5837 transitions. Word has length 269 [2021-11-20 23:51:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:37,891 INFO L470 AbstractCegarLoop]: Abstraction has 4118 states and 5837 transitions. [2021-11-20 23:51:37,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 23:51:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 5837 transitions. [2021-11-20 23:51:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-20 23:51:37,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:37,904 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:37,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:51:37,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 428251040, now seen corresponding path program 1 times [2021-11-20 23:51:37,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:37,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033400848] [2021-11-20 23:51:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:37,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2021-11-20 23:51:38,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:38,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033400848] [2021-11-20 23:51:38,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033400848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:51:38,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:51:38,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:51:38,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561635366] [2021-11-20 23:51:38,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:51:38,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:51:38,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:51:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:51:38,284 INFO L87 Difference]: Start difference. First operand 4118 states and 5837 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:51:41,471 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:44,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:46,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:49,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:51:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:50,069 INFO L93 Difference]: Finished difference Result 9229 states and 13061 transitions. [2021-11-20 23:51:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:51:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 274 [2021-11-20 23:51:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:50,117 INFO L225 Difference]: With dead ends: 9229 [2021-11-20 23:51:50,117 INFO L226 Difference]: Without dead ends: 5128 [2021-11-20 23:51:50,141 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 [2021-11-20 23:51:50,141 INFO L933 BasicCegarLoop]: 2585 mSDtfsCounter, 1261 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 4085 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:50,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 4085 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 644 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2021-11-20 23:51:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2021-11-20 23:51:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 5122. [2021-11-20 23:51:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5122 states, 3042 states have (on average 1.2790927021696252) internal successors, (3891), 3126 states have internal predecessors, (3891), 1663 states have call successors, (1663), 420 states have call predecessors, (1663), 416 states have return successors, (1664), 1632 states have call predecessors, (1664), 1663 states have call successors, (1664) [2021-11-20 23:51:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5122 states to 5122 states and 7218 transitions. [2021-11-20 23:51:50,475 INFO L78 Accepts]: Start accepts. Automaton has 5122 states and 7218 transitions. Word has length 274 [2021-11-20 23:51:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:50,477 INFO L470 AbstractCegarLoop]: Abstraction has 5122 states and 7218 transitions. [2021-11-20 23:51:50,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-20 23:51:50,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5122 states and 7218 transitions. [2021-11-20 23:51:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-20 23:51:50,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:50,492 INFO L514 BasicCegarLoop]: trace histogram [18, 10, 10, 9, 9, 9, 9, 9, 9, 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, 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] [2021-11-20 23:51:50,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:51:50,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1739906641, now seen corresponding path program 1 times [2021-11-20 23:51:50,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:50,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897186168] [2021-11-20 23:51:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:50,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-11-20 23:51:51,691 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:51,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897186168] [2021-11-20 23:51:51,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897186168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:51:51,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:51:51,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:51:51,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651757529] [2021-11-20 23:51:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:51:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:51:51,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:51,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:51:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:51:51,695 INFO L87 Difference]: Start difference. First operand 5122 states and 7218 transitions. Second operand has 6 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-20 23:51:57,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:02,010 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:04,235 INFO L93 Difference]: Finished difference Result 6386 states and 8948 transitions. [2021-11-20 23:52:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:52:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 2 states have call successors, (42) Word has length 337 [2021-11-20 23:52:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:04,311 INFO L225 Difference]: With dead ends: 6386 [2021-11-20 23:52:04,312 INFO L226 Difference]: Without dead ends: 6384 [2021-11-20 23:52:04,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:52:04,317 INFO L933 BasicCegarLoop]: 1908 mSDtfsCounter, 1053 mSDsluCounter, 7622 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 8609 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:04,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 8609 Invalid, 1805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 1799 Invalid, 2 Unknown, 0 Unchecked, 11.9s Time] [2021-11-20 23:52:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-11-20 23:52:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 6311. [2021-11-20 23:52:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6311 states, 3758 states have (on average 1.2711548696114954) internal successors, (4777), 3870 states have internal predecessors, (4777), 2023 states have call successors, (2023), 539 states have call predecessors, (2023), 529 states have return successors, (2032), 1971 states have call predecessors, (2032), 2023 states have call successors, (2032) [2021-11-20 23:52:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6311 states to 6311 states and 8832 transitions. [2021-11-20 23:52:04,770 INFO L78 Accepts]: Start accepts. Automaton has 6311 states and 8832 transitions. Word has length 337 [2021-11-20 23:52:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:04,771 INFO L470 AbstractCegarLoop]: Abstraction has 6311 states and 8832 transitions. [2021-11-20 23:52:04,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (42), 3 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-20 23:52:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6311 states and 8832 transitions. [2021-11-20 23:52:04,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-11-20 23:52:04,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:04,799 INFO L514 BasicCegarLoop]: trace histogram [19, 12, 12, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:04,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:52:04,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 199992731, now seen corresponding path program 1 times [2021-11-20 23:52:04,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:04,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017624656] [2021-11-20 23:52:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:04,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:04,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:52:04,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20041067] [2021-11-20 23:52:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:04,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:04,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:04,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:04,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:52:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3935 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:52:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2021-11-20 23:52:07,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:52:07,387 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017624656] [2021-11-20 23:52:07,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:52:07,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20041067] [2021-11-20 23:52:07,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20041067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:07,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:07,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:52:07,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966159941] [2021-11-20 23:52:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:07,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:52:07,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:52:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:52:07,391 INFO L87 Difference]: Start difference. First operand 6311 states and 8832 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-20 23:52:10,417 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:13,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:14,123 INFO L93 Difference]: Finished difference Result 14138 states and 19782 transitions. [2021-11-20 23:52:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:52:14,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 407 [2021-11-20 23:52:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:14,190 INFO L225 Difference]: With dead ends: 14138 [2021-11-20 23:52:14,190 INFO L226 Difference]: Without dead ends: 7862 [2021-11-20 23:52:14,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:52:14,232 INFO L933 BasicCegarLoop]: 2623 mSDtfsCounter, 1311 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 4191 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:14,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 4191 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 664 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-20 23:52:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7862 states. [2021-11-20 23:52:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7862 to 7856. [2021-11-20 23:52:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7856 states, 4670 states have (on average 1.2670235546038544) internal successors, (5917), 4809 states have internal predecessors, (5917), 2512 states have call successors, (2512), 690 states have call predecessors, (2512), 673 states have return successors, (2521), 2444 states have call predecessors, (2521), 2512 states have call successors, (2521) [2021-11-20 23:52:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7856 states to 7856 states and 10950 transitions. [2021-11-20 23:52:14,894 INFO L78 Accepts]: Start accepts. Automaton has 7856 states and 10950 transitions. Word has length 407 [2021-11-20 23:52:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:14,897 INFO L470 AbstractCegarLoop]: Abstraction has 7856 states and 10950 transitions. [2021-11-20 23:52:14,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-20 23:52:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7856 states and 10950 transitions. [2021-11-20 23:52:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-20 23:52:14,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:14,935 INFO L514 BasicCegarLoop]: trace histogram [19, 12, 12, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:14,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:15,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:15,163 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2141153879, now seen corresponding path program 1 times [2021-11-20 23:52:15,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:15,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753604467] [2021-11-20 23:52:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:15,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:15,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:52:15,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312699126] [2021-11-20 23:52:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:15,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:15,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:15,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:52:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 4209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:52:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2021-11-20 23:52:17,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:52:17,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753604467] [2021-11-20 23:52:17,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:52:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312699126] [2021-11-20 23:52:17,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312699126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:17,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:17,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:52:17,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133368031] [2021-11-20 23:52:17,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:17,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:52:17,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:17,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:52:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:52:17,746 INFO L87 Difference]: Start difference. First operand 7856 states and 10950 transitions. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 4 states have internal predecessors, (185), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (63), 3 states have call predecessors, (63), 2 states have call successors, (63) [2021-11-20 23:52:21,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:24,374 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:25,715 INFO L93 Difference]: Finished difference Result 15695 states and 21887 transitions. [2021-11-20 23:52:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:52:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 4 states have internal predecessors, (185), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (63), 3 states have call predecessors, (63), 2 states have call successors, (63) Word has length 464 [2021-11-20 23:52:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:25,762 INFO L225 Difference]: With dead ends: 15695 [2021-11-20 23:52:25,763 INFO L226 Difference]: Without dead ends: 7874 [2021-11-20 23:52:25,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:52:25,794 INFO L933 BasicCegarLoop]: 1632 mSDtfsCounter, 13 mSDsluCounter, 5555 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:25,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 6494 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 942 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-20 23:52:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7874 states. [2021-11-20 23:52:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7874 to 7868. [2021-11-20 23:52:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 4679 states have (on average 1.2665099380209446) internal successors, (5926), 4818 states have internal predecessors, (5926), 2512 states have call successors, (2512), 690 states have call predecessors, (2512), 676 states have return successors, (2527), 2447 states have call predecessors, (2527), 2512 states have call successors, (2527) [2021-11-20 23:52:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10965 transitions. [2021-11-20 23:52:26,416 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10965 transitions. Word has length 464 [2021-11-20 23:52:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 7868 states and 10965 transitions. [2021-11-20 23:52:26,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 4 states have internal predecessors, (185), 2 states have call successors, (69), 2 states have call predecessors, (69), 3 states have return successors, (63), 3 states have call predecessors, (63), 2 states have call successors, (63) [2021-11-20 23:52:26,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10965 transitions. [2021-11-20 23:52:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-11-20 23:52:26,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:26,456 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 9, 9, 9, 9, 9, 9, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2021-11-20 23:52:26,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:26,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:26,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1965047809, now seen corresponding path program 1 times [2021-11-20 23:52:26,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:26,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206377661] [2021-11-20 23:52:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:26,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:26,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:52:26,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756073688] [2021-11-20 23:52:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:26,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:26,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:26,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:26,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:52:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 4468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:52:28,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2021-11-20 23:52:29,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:52:29,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206377661] [2021-11-20 23:52:29,077 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:52:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756073688] [2021-11-20 23:52:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756073688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:29,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:52:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381990891] [2021-11-20 23:52:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:29,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:52:29,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:52:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:52:29,081 INFO L87 Difference]: Start difference. First operand 7868 states and 10965 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-20 23:52:31,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:34,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:35,776 INFO L93 Difference]: Finished difference Result 17821 states and 24865 transitions. [2021-11-20 23:52:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:52:35,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) Word has length 485 [2021-11-20 23:52:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:35,842 INFO L225 Difference]: With dead ends: 17821 [2021-11-20 23:52:35,842 INFO L226 Difference]: Without dead ends: 9988 [2021-11-20 23:52:35,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:52:35,881 INFO L933 BasicCegarLoop]: 2184 mSDtfsCounter, 1650 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 26 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:35,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 3549 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 518 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-20 23:52:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9988 states. [2021-11-20 23:52:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9988 to 9981. [2021-11-20 23:52:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9981 states, 5921 states have (on average 1.2693801722681979) internal successors, (7516), 6091 states have internal predecessors, (7516), 3197 states have call successors, (3197), 880 states have call predecessors, (3197), 862 states have return successors, (3213), 3117 states have call predecessors, (3213), 3197 states have call successors, (3213) [2021-11-20 23:52:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9981 states to 9981 states and 13926 transitions. [2021-11-20 23:52:36,614 INFO L78 Accepts]: Start accepts. Automaton has 9981 states and 13926 transitions. Word has length 485 [2021-11-20 23:52:36,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:36,615 INFO L470 AbstractCegarLoop]: Abstraction has 9981 states and 13926 transitions. [2021-11-20 23:52:36,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 3 states have call successors, (75), 3 states have call predecessors, (75), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-20 23:52:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 9981 states and 13926 transitions. [2021-11-20 23:52:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-11-20 23:52:36,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:36,644 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:52:36,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 23:52:36,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:36,864 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:36,864 INFO L85 PathProgramCache]: Analyzing trace with hash 410835594, now seen corresponding path program 1 times [2021-11-20 23:52:36,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:36,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733464700] [2021-11-20 23:52:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:36,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:36,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:52:36,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866447876] [2021-11-20 23:52:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:36,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:36,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:37,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:52:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 4401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:52:38,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-11-20 23:52:39,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:52:39,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733464700] [2021-11-20 23:52:39,157 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:52:39,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866447876] [2021-11-20 23:52:39,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866447876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:39,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:39,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:52:39,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705821673] [2021-11-20 23:52:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:39,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:52:39,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:52:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:52:39,165 INFO L87 Difference]: Start difference. First operand 9981 states and 13926 transitions. Second operand has 6 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 3 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (66), 4 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-20 23:52:42,692 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:45,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:49,043 INFO L93 Difference]: Finished difference Result 20004 states and 28041 transitions. [2021-11-20 23:52:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:52:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 3 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (66), 4 states have call predecessors, (66), 3 states have call successors, (66) Word has length 476 [2021-11-20 23:52:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:49,110 INFO L225 Difference]: With dead ends: 20004 [2021-11-20 23:52:49,111 INFO L226 Difference]: Without dead ends: 10058 [2021-11-20 23:52:49,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:52:49,157 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 21 mSDsluCounter, 7427 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8134 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:49,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8134 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1177 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2021-11-20 23:52:49,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-11-20 23:52:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 10025. [2021-11-20 23:52:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10025 states, 5954 states have (on average 1.2678871346993619) internal successors, (7549), 6124 states have internal predecessors, (7549), 3197 states have call successors, (3197), 880 states have call predecessors, (3197), 873 states have return successors, (3271), 3128 states have call predecessors, (3271), 3197 states have call successors, (3271) [2021-11-20 23:52:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10025 states to 10025 states and 14017 transitions. [2021-11-20 23:52:49,967 INFO L78 Accepts]: Start accepts. Automaton has 10025 states and 14017 transitions. Word has length 476 [2021-11-20 23:52:49,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:49,969 INFO L470 AbstractCegarLoop]: Abstraction has 10025 states and 14017 transitions. [2021-11-20 23:52:49,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 3 states have call successors, (72), 2 states have call predecessors, (72), 3 states have return successors, (66), 4 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-20 23:52:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10025 states and 14017 transitions. [2021-11-20 23:52:49,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-20 23:52:49,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:49,998 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 9, 9, 9, 9, 9, 9, 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, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 23:52:50,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:52:50,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:50,219 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 150479113, now seen corresponding path program 1 times [2021-11-20 23:52:50,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661789603] [2021-11-20 23:52:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:50,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:50,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:52:50,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215770696] [2021-11-20 23:52:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:50,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:50,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:50,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:52:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 4434 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:52:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2021-11-20 23:52:52,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:52:52,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:52,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661789603] [2021-11-20 23:52:52,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:52:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215770696] [2021-11-20 23:52:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215770696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:52,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:52,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:52:52,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945000674] [2021-11-20 23:52:52,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:52,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:52:52,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:52:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:52:52,719 INFO L87 Difference]: Start difference. First operand 10025 states and 14017 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 3 states have call successors, (72), 3 states have call predecessors, (72), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-20 23:52:55,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:57,918 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:52:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:59,658 INFO L93 Difference]: Finished difference Result 22932 states and 32101 transitions. [2021-11-20 23:52:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:52:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 3 states have call successors, (72), 3 states have call predecessors, (72), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) Word has length 484 [2021-11-20 23:52:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:59,730 INFO L225 Difference]: With dead ends: 22932 [2021-11-20 23:52:59,730 INFO L226 Difference]: Without dead ends: 12942 [2021-11-20 23:52:59,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:52:59,768 INFO L933 BasicCegarLoop]: 2200 mSDtfsCounter, 1393 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 3708 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:52:59,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 3708 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 596 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-20 23:52:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12942 states. [2021-11-20 23:53:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12942 to 12930. [2021-11-20 23:53:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12930 states, 7705 states have (on average 1.2677482154445165) internal successors, (9768), 7913 states have internal predecessors, (9768), 4097 states have call successors, (4097), 1133 states have call predecessors, (4097), 1127 states have return successors, (4192), 4015 states have call predecessors, (4192), 4097 states have call successors, (4192) [2021-11-20 23:53:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12930 states to 12930 states and 18057 transitions. [2021-11-20 23:53:00,687 INFO L78 Accepts]: Start accepts. Automaton has 12930 states and 18057 transitions. Word has length 484 [2021-11-20 23:53:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:53:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 12930 states and 18057 transitions. [2021-11-20 23:53:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 3 states have call successors, (72), 3 states have call predecessors, (72), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2021-11-20 23:53:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12930 states and 18057 transitions. [2021-11-20 23:53:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-11-20 23:53:00,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:53:00,721 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 9, 9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2021-11-20 23:53:00,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:53:00,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:53:00,936 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:53:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:53:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -465593334, now seen corresponding path program 1 times [2021-11-20 23:53:00,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:53:00,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151825865] [2021-11-20 23:53:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:00,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:53:01,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:53:01,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595754378] [2021-11-20 23:53:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:53:01,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:53:01,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:53:01,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:53:01,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0a40f0-bf26-4669-9a88-54ca5f539330/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:53:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:53:02,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 4412 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:53:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:53:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-20 23:53:03,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:53:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2021-11-20 23:53:04,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:53:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151825865] [2021-11-20 23:53:04,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:53:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595754378] [2021-11-20 23:53:04,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595754378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:53:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210727453] [2021-11-20 23:53:04,815 INFO L159 IcfgInterpreter]: Started Sifa with 255 locations of interest [2021-11-20 23:53:04,816 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:53:04,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:53:04,837 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:53:04,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs