./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-usb-pegasus.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS --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 97d835cf94d1b164c94e454298c9901161d3451d2aec7fccfb9f6ea65c4976ed --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:51:40,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:51:40,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:51:40,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:51:40,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:51:40,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:51:40,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:51:40,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:51:40,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:51:40,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:51:40,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:51:40,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:51:40,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:51:40,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:51:40,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:51:40,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:51:40,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:51:40,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:51:40,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:51:40,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:51:40,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:51:40,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:51:40,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:51:40,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:51:40,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:51:40,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:51:40,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:51:40,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:51:40,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:51:40,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:51:40,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:51:40,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:51:40,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:51:40,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:51:40,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:51:40,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:51:40,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:51:40,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:51:40,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:51:40,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:51:40,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:51:40,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:51:40,457 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:51:40,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:51:40,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:51:40,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:51:40,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:51:40,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:51:40,459 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:51:40,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:51:40,460 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:51:40,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:51:40,460 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:51:40,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:51:40,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:51:40,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:51:40,461 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:51:40,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:51:40,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:51:40,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:51:40,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:51:40,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:51:40,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:51:40,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:51:40,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:51:40,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:51:40,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:51:40,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:51:40,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:51:40,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:51:40,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:51:40,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:51:40,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:51:40,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:51:40,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:51:40,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:51:40,466 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:51:40,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:51:40,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:51:40,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:51:40,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97d835cf94d1b164c94e454298c9901161d3451d2aec7fccfb9f6ea65c4976ed [2022-11-19 07:51:40,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:51:40,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:51:40,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:51:40,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:51:40,754 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:51:40,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i [2022-11-19 07:51:40,833 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/data/2be1e6a68/7f8bd9c5dca44293a9267114c4ceda17/FLAGf03bdc940 [2022-11-19 07:51:41,704 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:51:41,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i [2022-11-19 07:51:41,752 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/data/2be1e6a68/7f8bd9c5dca44293a9267114c4ceda17/FLAGf03bdc940 [2022-11-19 07:51:42,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/data/2be1e6a68/7f8bd9c5dca44293a9267114c4ceda17 [2022-11-19 07:51:42,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:51:42,185 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:51:42,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:51:42,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:51:42,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:51:42,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:42" (1/1) ... [2022-11-19 07:51:42,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff1de5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:42, skipping insertion in model container [2022-11-19 07:51:42,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:51:42" (1/1) ... [2022-11-19 07:51:42,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:51:42,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:51:45,128 WARN L234 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_5d561278-0521-4e24-8a3f-56c248623634/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327451,327464] [2022-11-19 07:51:45,134 WARN L234 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_5d561278-0521-4e24-8a3f-56c248623634/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327596,327609] [2022-11-19 07:51:45,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:51:45,245 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:51:45,612 WARN L234 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_5d561278-0521-4e24-8a3f-56c248623634/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327451,327464] [2022-11-19 07:51:45,613 WARN L234 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_5d561278-0521-4e24-8a3f-56c248623634/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i[327596,327609] [2022-11-19 07:51:45,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:51:45,835 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:51:45,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45 WrapperNode [2022-11-19 07:51:45,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:51:45,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:51:45,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:51:45,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:51:45,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:45,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,212 INFO L138 Inliner]: procedures = 393, calls = 3380, calls flagged for inlining = 185, calls inlined = 165, statements flattened = 5628 [2022-11-19 07:51:46,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:51:46,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:51:46,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:51:46,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:51:46,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,479 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:51:46,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:51:46,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:51:46,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:51:46,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (1/1) ... [2022-11-19 07:51:46,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:51:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:51:46,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:51:46,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:51:46,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:51:46,618 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:51:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-19 07:51:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-19 07:51:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:51:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:51:46,619 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2022-11-19 07:51:46,619 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2022-11-19 07:51:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure set_carrier [2022-11-19 07:51:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure set_carrier [2022-11-19 07:51:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure read_mii_word [2022-11-19 07:51:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mii_word [2022-11-19 07:51:46,620 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-19 07:51:46,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2022-11-19 07:51:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-19 07:51:46,621 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-19 07:51:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 07:51:46,621 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-19 07:51:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 07:51:46,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 07:51:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:51:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-19 07:51:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-19 07:51:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_dec_workqueue [2022-11-19 07:51:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_dec_workqueue [2022-11-19 07:51:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 07:51:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 07:51:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_disconnect [2022-11-19 07:51:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_disconnect [2022-11-19 07:51:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:51:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2022-11-19 07:51:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2022-11-19 07:51:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:51:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure __mii_op [2022-11-19 07:51:46,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __mii_op [2022-11-19 07:51:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2022-11-19 07:51:46,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2022-11-19 07:51:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:51:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2022-11-19 07:51:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2022-11-19 07:51:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:51:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:51:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_set_wol [2022-11-19 07:51:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_set_wol [2022-11-19 07:51:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2022-11-19 07:51:46,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2022-11-19 07:51:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-19 07:51:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-19 07:51:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-19 07:51:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-19 07:51:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_set_multicast [2022-11-19 07:51:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_set_multicast [2022-11-19 07:51:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure set_register [2022-11-19 07:51:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure set_register [2022-11-19 07:51:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:51:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2022-11-19 07:51:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2022-11-19 07:51:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:51:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 07:51:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 07:51:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:51:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-19 07:51:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-19 07:51:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-19 07:51:46,632 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-19 07:51:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-19 07:51:46,632 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-19 07:51:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2022-11-19 07:51:46,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2022-11-19 07:51:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2022-11-19 07:51:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2022-11-19 07:51:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-19 07:51:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-19 07:51:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2022-11-19 07:51:46,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2022-11-19 07:51:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2022-11-19 07:51:46,634 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2022-11-19 07:51:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:51:46,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:51:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure read_bulk_callback [2022-11-19 07:51:46,635 INFO L138 BoogieDeclarations]: Found implementation of procedure read_bulk_callback [2022-11-19 07:51:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-19 07:51:46,635 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-19 07:51:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:51:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:51:46,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:51:46,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:51:46,637 INFO L130 BoogieDeclarations]: Found specification of procedure write_mii_word [2022-11-19 07:51:46,637 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mii_word [2022-11-19 07:51:46,638 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-19 07:51:46,639 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-19 07:51:46,639 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2022-11-19 07:51:46,639 INFO L138 BoogieDeclarations]: Found implementation of procedure strsep [2022-11-19 07:51:46,639 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 07:51:46,639 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 07:51:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_open [2022-11-19 07:51:46,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_open [2022-11-19 07:51:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 07:51:46,640 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 07:51:46,640 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2022-11-19 07:51:46,641 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2022-11-19 07:51:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:51:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure read_eprom_word [2022-11-19 07:51:46,641 INFO L138 BoogieDeclarations]: Found implementation of procedure read_eprom_word [2022-11-19 07:51:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-19 07:51:46,642 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-19 07:51:46,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:51:46,642 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_nway_reset [2022-11-19 07:51:46,643 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_nway_reset [2022-11-19 07:51:46,643 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_resume [2022-11-19 07:51:46,643 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_resume [2022-11-19 07:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_tx_timeout [2022-11-19 07:51:46,644 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_tx_timeout [2022-11-19 07:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 07:51:46,644 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 07:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-19 07:51:46,644 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-19 07:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure free_all_urbs [2022-11-19 07:51:46,644 INFO L138 BoogieDeclarations]: Found implementation of procedure free_all_urbs [2022-11-19 07:51:46,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2022-11-19 07:51:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2022-11-19 07:51:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 07:51:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 07:51:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 07:51:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 07:51:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure intr_callback [2022-11-19 07:51:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure intr_callback [2022-11-19 07:51:46,645 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb_ip_align [2022-11-19 07:51:46,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb_ip_align [2022-11-19 07:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 07:51:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 07:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 07:51:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 07:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_pegasus_exit_11_2 [2022-11-19 07:51:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_pegasus_exit_11_2 [2022-11-19 07:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:51:46,646 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:51:46,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:51:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 07:51:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 07:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-19 07:51:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-19 07:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2022-11-19 07:51:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2022-11-19 07:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure pegasus_close [2022-11-19 07:51:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure pegasus_close [2022-11-19 07:51:46,647 INFO L130 BoogieDeclarations]: Found specification of procedure get_registers [2022-11-19 07:51:46,647 INFO L138 BoogieDeclarations]: Found implementation of procedure get_registers [2022-11-19 07:51:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2022-11-19 07:51:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_instance_release_3_4 [2022-11-19 07:51:46,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_instance_release_3_4 [2022-11-19 07:51:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:51:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure set_registers [2022-11-19 07:51:46,648 INFO L138 BoogieDeclarations]: Found implementation of procedure set_registers [2022-11-19 07:51:46,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-19 07:51:46,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-19 07:51:47,454 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:51:47,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:51:48,161 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:51:54,822 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2022-11-19 07:51:55,309 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:51:56,516 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:51:56,517 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:51:56,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:56 BoogieIcfgContainer [2022-11-19 07:51:56,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:51:56,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:51:56,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:51:56,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:51:56,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:51:42" (1/3) ... [2022-11-19 07:51:56,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb090e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:56, skipping insertion in model container [2022-11-19 07:51:56,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:51:45" (2/3) ... [2022-11-19 07:51:56,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb090e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:51:56, skipping insertion in model container [2022-11-19 07:51:56,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:51:56" (3/3) ... [2022-11-19 07:51:56,531 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-alloc-spinlock_drivers-net-usb-pegasus.cil.i [2022-11-19 07:51:56,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:51:56,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:51:56,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:51:56,662 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f8d7f6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:51:56,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:51:56,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 1028 states, 635 states have (on average 1.325984251968504) internal successors, (842), 643 states have internal predecessors, (842), 322 states have call successors, (322), 71 states have call predecessors, (322), 70 states have return successors, (316), 314 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-19 07:51:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:51:56,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:51:56,708 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:51:56,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:51:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:51:56,715 INFO L85 PathProgramCache]: Analyzing trace with hash -70123771, now seen corresponding path program 1 times [2022-11-19 07:51:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:51:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889286959] [2022-11-19 07:51:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:51:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:51:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:51:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-19 07:51:57,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:51:57,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889286959] [2022-11-19 07:51:57,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889286959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:51:57,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:51:57,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:51:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388397270] [2022-11-19 07:51:57,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:51:57,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:51:57,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:51:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:51:57,962 INFO L87 Difference]: Start difference. First operand has 1028 states, 635 states have (on average 1.325984251968504) internal successors, (842), 643 states have internal predecessors, (842), 322 states have call successors, (322), 71 states have call predecessors, (322), 70 states have return successors, (316), 314 states have call predecessors, (316), 316 states have call successors, (316) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:52:02,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:02,979 INFO L93 Difference]: Finished difference Result 2868 states and 4163 transitions. [2022-11-19 07:52:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2022-11-19 07:52:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:03,009 INFO L225 Difference]: With dead ends: 2868 [2022-11-19 07:52:03,009 INFO L226 Difference]: Without dead ends: 1800 [2022-11-19 07:52:03,024 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:52:03,028 INFO L413 NwaCegarLoop]: 1545 mSDtfsCounter, 1193 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:03,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 2785 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 07:52:03,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-11-19 07:52:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1796. [2022-11-19 07:52:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1134 states have (on average 1.3209876543209877) internal successors, (1498), 1144 states have internal predecessors, (1498), 528 states have call successors, (528), 133 states have call predecessors, (528), 133 states have return successors, (528), 524 states have call predecessors, (528), 528 states have call successors, (528) [2022-11-19 07:52:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2554 transitions. [2022-11-19 07:52:03,272 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2554 transitions. Word has length 146 [2022-11-19 07:52:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:03,275 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 2554 transitions. [2022-11-19 07:52:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:52:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2554 transitions. [2022-11-19 07:52:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 07:52:03,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:03,292 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:03,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:52:03,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash 624868621, now seen corresponding path program 1 times [2022-11-19 07:52:03,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661387800] [2022-11-19 07:52:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-19 07:52:03,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:03,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661387800] [2022-11-19 07:52:03,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661387800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:03,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:03,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:03,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860653930] [2022-11-19 07:52:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:03,952 INFO L87 Difference]: Start difference. First operand 1796 states and 2554 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:52:07,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:08,947 INFO L93 Difference]: Finished difference Result 4864 states and 6864 transitions. [2022-11-19 07:52:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 158 [2022-11-19 07:52:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:08,968 INFO L225 Difference]: With dead ends: 4864 [2022-11-19 07:52:08,968 INFO L226 Difference]: Without dead ends: 3093 [2022-11-19 07:52:08,975 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:52:08,976 INFO L413 NwaCegarLoop]: 1383 mSDtfsCounter, 929 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 2519 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:08,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 2519 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 494 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 07:52:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2022-11-19 07:52:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3089. [2022-11-19 07:52:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 1942 states have (on average 1.305870236869207) internal successors, (2536), 1958 states have internal predecessors, (2536), 896 states have call successors, (896), 250 states have call predecessors, (896), 250 states have return successors, (902), 887 states have call predecessors, (902), 896 states have call successors, (902) [2022-11-19 07:52:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 4334 transitions. [2022-11-19 07:52:09,125 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 4334 transitions. Word has length 158 [2022-11-19 07:52:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:09,127 INFO L495 AbstractCegarLoop]: Abstraction has 3089 states and 4334 transitions. [2022-11-19 07:52:09,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:52:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 4334 transitions. [2022-11-19 07:52:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-19 07:52:09,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:09,131 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:52:09,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1637582197, now seen corresponding path program 1 times [2022-11-19 07:52:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:09,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401367149] [2022-11-19 07:52:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-19 07:52:09,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:09,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401367149] [2022-11-19 07:52:09,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401367149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:09,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:09,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329822092] [2022-11-19 07:52:09,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:09,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:09,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:09,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:09,804 INFO L87 Difference]: Start difference. First operand 3089 states and 4334 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:52:13,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:14,435 INFO L93 Difference]: Finished difference Result 7285 states and 10224 transitions. [2022-11-19 07:52:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 161 [2022-11-19 07:52:14,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:14,461 INFO L225 Difference]: With dead ends: 7285 [2022-11-19 07:52:14,461 INFO L226 Difference]: Without dead ends: 4221 [2022-11-19 07:52:14,473 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:52:14,474 INFO L413 NwaCegarLoop]: 1480 mSDtfsCounter, 591 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 2637 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:14,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 2637 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 577 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 07:52:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2022-11-19 07:52:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 4211. [2022-11-19 07:52:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 2698 states have (on average 1.3113417346182357) internal successors, (3538), 2732 states have internal predecessors, (3538), 1165 states have call successors, (1165), 347 states have call predecessors, (1165), 347 states have return successors, (1171), 1142 states have call predecessors, (1171), 1165 states have call successors, (1171) [2022-11-19 07:52:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 5874 transitions. [2022-11-19 07:52:14,690 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 5874 transitions. Word has length 161 [2022-11-19 07:52:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:14,691 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 5874 transitions. [2022-11-19 07:52:14,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 07:52:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 5874 transitions. [2022-11-19 07:52:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-19 07:52:14,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:14,696 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 12, 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] [2022-11-19 07:52:14,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:52:14,696 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:14,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1777273557, now seen corresponding path program 1 times [2022-11-19 07:52:14,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:14,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364812914] [2022-11-19 07:52:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:14,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-19 07:52:15,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:15,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364812914] [2022-11-19 07:52:15,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364812914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:15,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:15,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:15,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494220075] [2022-11-19 07:52:15,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:15,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:15,309 INFO L87 Difference]: Start difference. First operand 4211 states and 5874 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-19 07:52:19,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:20,276 INFO L93 Difference]: Finished difference Result 12427 states and 17306 transitions. [2022-11-19 07:52:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:20,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2022-11-19 07:52:20,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:20,326 INFO L225 Difference]: With dead ends: 12427 [2022-11-19 07:52:20,326 INFO L226 Difference]: Without dead ends: 8241 [2022-11-19 07:52:20,344 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:52:20,348 INFO L413 NwaCegarLoop]: 1604 mSDtfsCounter, 1168 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:20,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 2785 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 546 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 07:52:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8241 states. [2022-11-19 07:52:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8241 to 8223. [2022-11-19 07:52:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8223 states, 5276 states have (on average 1.310841546626232) internal successors, (6916), 5348 states have internal predecessors, (6916), 2254 states have call successors, (2254), 692 states have call predecessors, (2254), 692 states have return successors, (2266), 2201 states have call predecessors, (2266), 2254 states have call successors, (2266) [2022-11-19 07:52:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 11436 transitions. [2022-11-19 07:52:20,957 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 11436 transitions. Word has length 160 [2022-11-19 07:52:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:20,959 INFO L495 AbstractCegarLoop]: Abstraction has 8223 states and 11436 transitions. [2022-11-19 07:52:20,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-19 07:52:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 11436 transitions. [2022-11-19 07:52:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-19 07:52:20,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:20,968 INFO L195 NwaCegarLoop]: trace histogram [15, 12, 12, 12, 12, 12, 12, 3, 3, 3, 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] [2022-11-19 07:52:20,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:52:20,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2038891059, now seen corresponding path program 1 times [2022-11-19 07:52:20,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:20,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321154429] [2022-11-19 07:52:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2022-11-19 07:52:21,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321154429] [2022-11-19 07:52:21,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321154429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:21,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:21,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:21,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648139544] [2022-11-19 07:52:21,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:21,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:21,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:21,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:21,489 INFO L87 Difference]: Start difference. First operand 8223 states and 11436 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:52:25,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:26,524 INFO L93 Difference]: Finished difference Result 17333 states and 23982 transitions. [2022-11-19 07:52:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 175 [2022-11-19 07:52:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:26,573 INFO L225 Difference]: With dead ends: 17333 [2022-11-19 07:52:26,573 INFO L226 Difference]: Without dead ends: 9135 [2022-11-19 07:52:26,600 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:52:26,601 INFO L413 NwaCegarLoop]: 1357 mSDtfsCounter, 860 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:26,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2476 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 07:52:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9135 states. [2022-11-19 07:52:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9135 to 9133. [2022-11-19 07:52:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9133 states, 5836 states have (on average 1.3012337217272105) internal successors, (7594), 5910 states have internal predecessors, (7594), 2484 states have call successors, (2484), 812 states have call predecessors, (2484), 812 states have return successors, (2496), 2429 states have call predecessors, (2496), 2484 states have call successors, (2496) [2022-11-19 07:52:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9133 states to 9133 states and 12574 transitions. [2022-11-19 07:52:27,053 INFO L78 Accepts]: Start accepts. Automaton has 9133 states and 12574 transitions. Word has length 175 [2022-11-19 07:52:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:27,054 INFO L495 AbstractCegarLoop]: Abstraction has 9133 states and 12574 transitions. [2022-11-19 07:52:27,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:52:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 9133 states and 12574 transitions. [2022-11-19 07:52:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-19 07:52:27,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:27,058 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 12, 12, 12, 12, 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] [2022-11-19 07:52:27,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:52:27,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:27,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1350996594, now seen corresponding path program 1 times [2022-11-19 07:52:27,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:27,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669613370] [2022-11-19 07:52:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-19 07:52:27,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669613370] [2022-11-19 07:52:27,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669613370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:27,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:52:27,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:52:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520020021] [2022-11-19 07:52:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:52:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:52:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:52:27,615 INFO L87 Difference]: Start difference. First operand 9133 states and 12574 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:52:31,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:32,709 INFO L93 Difference]: Finished difference Result 19994 states and 27459 transitions. [2022-11-19 07:52:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:52:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 179 [2022-11-19 07:52:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:32,761 INFO L225 Difference]: With dead ends: 19994 [2022-11-19 07:52:32,761 INFO L226 Difference]: Without dead ends: 10886 [2022-11-19 07:52:32,791 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:52:32,792 INFO L413 NwaCegarLoop]: 1570 mSDtfsCounter, 587 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:32,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 2751 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 575 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 07:52:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10886 states. [2022-11-19 07:52:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10886 to 10876. [2022-11-19 07:52:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10876 states, 7036 states have (on average 1.3031552018192154) internal successors, (9169), 7140 states have internal predecessors, (9169), 2857 states have call successors, (2857), 982 states have call predecessors, (2857), 982 states have return successors, (2869), 2780 states have call predecessors, (2869), 2857 states have call successors, (2869) [2022-11-19 07:52:33,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 14895 transitions. [2022-11-19 07:52:33,387 INFO L78 Accepts]: Start accepts. Automaton has 10876 states and 14895 transitions. Word has length 179 [2022-11-19 07:52:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:33,388 INFO L495 AbstractCegarLoop]: Abstraction has 10876 states and 14895 transitions. [2022-11-19 07:52:33,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:52:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 10876 states and 14895 transitions. [2022-11-19 07:52:33,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-19 07:52:33,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:33,394 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 12, 12, 12, 12, 12, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:52:33,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:52:33,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1572524835, now seen corresponding path program 1 times [2022-11-19 07:52:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997549770] [2022-11-19 07:52:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:33,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-11-19 07:52:39,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:39,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997549770] [2022-11-19 07:52:39,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997549770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:39,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538302592] [2022-11-19 07:52:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:39,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:39,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:39,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:39,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:52:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 5979 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:52:40,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2022-11-19 07:52:51,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:52:51,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538302592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:52:51,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:52:51,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-19 07:52:51,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918929937] [2022-11-19 07:52:51,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:52:51,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:52:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:52:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:52:51,439 INFO L87 Difference]: Start difference. First operand 10876 states and 14895 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-19 07:52:57,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:52:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:59,765 INFO L93 Difference]: Finished difference Result 14880 states and 20283 transitions. [2022-11-19 07:52:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:52:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 221 [2022-11-19 07:52:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:59,836 INFO L225 Difference]: With dead ends: 14880 [2022-11-19 07:52:59,836 INFO L226 Difference]: Without dead ends: 14878 [2022-11-19 07:52:59,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:52:59,846 INFO L413 NwaCegarLoop]: 1387 mSDtfsCounter, 863 mSDsluCounter, 4333 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 5720 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:59,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 5720 Invalid, 1492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 1491 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-19 07:52:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14878 states. [2022-11-19 07:53:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14878 to 14862. [2022-11-19 07:53:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 9596 states have (on average 1.291162984576907) internal successors, (12390), 9742 states have internal predecessors, (12390), 3911 states have call successors, (3911), 1354 states have call predecessors, (3911), 1354 states have return successors, (3923), 3798 states have call predecessors, (3923), 3911 states have call successors, (3923) [2022-11-19 07:53:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 20224 transitions. [2022-11-19 07:53:00,851 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 20224 transitions. Word has length 221 [2022-11-19 07:53:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:00,852 INFO L495 AbstractCegarLoop]: Abstraction has 14862 states and 20224 transitions. [2022-11-19 07:53:00,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 1 states have call successors, (25), 1 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-19 07:53:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 20224 transitions. [2022-11-19 07:53:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2022-11-19 07:53:00,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:00,878 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:53:00,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:01,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1183967340, now seen corresponding path program 1 times [2022-11-19 07:53:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962816704] [2022-11-19 07:53:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:01,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2022-11-19 07:53:01,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962816704] [2022-11-19 07:53:01,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962816704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:01,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:01,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:01,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643737966] [2022-11-19 07:53:01,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:01,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:01,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:01,999 INFO L87 Difference]: Start difference. First operand 14862 states and 20224 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2022-11-19 07:53:05,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:07,702 INFO L93 Difference]: Finished difference Result 43774 states and 59520 transitions. [2022-11-19 07:53:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:07,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 447 [2022-11-19 07:53:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:07,829 INFO L225 Difference]: With dead ends: 43774 [2022-11-19 07:53:07,829 INFO L226 Difference]: Without dead ends: 28996 [2022-11-19 07:53:07,875 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:53:07,875 INFO L413 NwaCegarLoop]: 1545 mSDtfsCounter, 1076 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:07,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 2693 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 536 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-19 07:53:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2022-11-19 07:53:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 28958. [2022-11-19 07:53:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28958 states, 18726 states have (on average 1.29168001708854) internal successors, (24188), 19022 states have internal predecessors, (24188), 7553 states have call successors, (7553), 2678 states have call predecessors, (7553), 2678 states have return successors, (7601), 7320 states have call predecessors, (7601), 7553 states have call successors, (7601) [2022-11-19 07:53:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28958 states to 28958 states and 39342 transitions. [2022-11-19 07:53:10,103 INFO L78 Accepts]: Start accepts. Automaton has 28958 states and 39342 transitions. Word has length 447 [2022-11-19 07:53:10,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:10,104 INFO L495 AbstractCegarLoop]: Abstraction has 28958 states and 39342 transitions. [2022-11-19 07:53:10,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2022-11-19 07:53:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28958 states and 39342 transitions. [2022-11-19 07:53:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-19 07:53:10,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:10,143 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:53:10,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:53:10,144 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1527520887, now seen corresponding path program 1 times [2022-11-19 07:53:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:10,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312362768] [2022-11-19 07:53:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:10,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2022-11-19 07:53:10,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:10,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312362768] [2022-11-19 07:53:10,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312362768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:10,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:10,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615476187] [2022-11-19 07:53:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:10,970 INFO L87 Difference]: Start difference. First operand 28958 states and 39342 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2022-11-19 07:53:15,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:16,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:16,969 INFO L93 Difference]: Finished difference Result 50083 states and 68241 transitions. [2022-11-19 07:53:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 446 [2022-11-19 07:53:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:17,109 INFO L225 Difference]: With dead ends: 50083 [2022-11-19 07:53:17,110 INFO L226 Difference]: Without dead ends: 28969 [2022-11-19 07:53:17,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:17,169 INFO L413 NwaCegarLoop]: 1183 mSDtfsCounter, 9 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:17,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2360 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 469 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-19 07:53:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28969 states. [2022-11-19 07:53:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28969 to 28963. [2022-11-19 07:53:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28963 states, 18730 states have (on average 1.291671115856914) internal successors, (24193), 19026 states have internal predecessors, (24193), 7554 states have call successors, (7554), 2678 states have call predecessors, (7554), 2678 states have return successors, (7602), 7321 states have call predecessors, (7602), 7554 states have call successors, (7602) [2022-11-19 07:53:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28963 states to 28963 states and 39349 transitions. [2022-11-19 07:53:18,969 INFO L78 Accepts]: Start accepts. Automaton has 28963 states and 39349 transitions. Word has length 446 [2022-11-19 07:53:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:18,971 INFO L495 AbstractCegarLoop]: Abstraction has 28963 states and 39349 transitions. [2022-11-19 07:53:18,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2022-11-19 07:53:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 28963 states and 39349 transitions. [2022-11-19 07:53:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-11-19 07:53:19,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:19,012 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:53:19,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:53:19,012 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:19,013 INFO L85 PathProgramCache]: Analyzing trace with hash -228443825, now seen corresponding path program 1 times [2022-11-19 07:53:19,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:19,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475233664] [2022-11-19 07:53:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:19,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1382 trivial. 0 not checked. [2022-11-19 07:53:20,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475233664] [2022-11-19 07:53:20,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475233664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:20,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:53:20,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:53:20,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053980522] [2022-11-19 07:53:20,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:20,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:20,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:20,151 INFO L87 Difference]: Start difference. First operand 28963 states and 39349 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-19 07:53:23,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:25,823 INFO L93 Difference]: Finished difference Result 58616 states and 81499 transitions. [2022-11-19 07:53:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 463 [2022-11-19 07:53:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:26,124 INFO L225 Difference]: With dead ends: 58616 [2022-11-19 07:53:26,125 INFO L226 Difference]: Without dead ends: 37497 [2022-11-19 07:53:26,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:53:26,174 INFO L413 NwaCegarLoop]: 1710 mSDtfsCounter, 379 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 3020 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 566 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-19 07:53:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37497 states. [2022-11-19 07:53:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37497 to 28979. [2022-11-19 07:53:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28979 states, 18741 states have (on average 1.2916599967984632) internal successors, (24207), 19037 states have internal predecessors, (24207), 7559 states have call successors, (7559), 2678 states have call predecessors, (7559), 2678 states have return successors, (7607), 7326 states have call predecessors, (7607), 7559 states have call successors, (7607) [2022-11-19 07:53:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28979 states to 28979 states and 39373 transitions. [2022-11-19 07:53:28,034 INFO L78 Accepts]: Start accepts. Automaton has 28979 states and 39373 transitions. Word has length 463 [2022-11-19 07:53:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:28,035 INFO L495 AbstractCegarLoop]: Abstraction has 28979 states and 39373 transitions. [2022-11-19 07:53:28,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-19 07:53:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 28979 states and 39373 transitions. [2022-11-19 07:53:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-11-19 07:53:28,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:28,081 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:28,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:53:28,081 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:28,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1903550476, now seen corresponding path program 1 times [2022-11-19 07:53:28,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:28,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494672460] [2022-11-19 07:53:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:28,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2022-11-19 07:53:29,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494672460] [2022-11-19 07:53:29,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494672460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:53:29,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642016481] [2022-11-19 07:53:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:29,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:29,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:53:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:31,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 8314 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:53:31,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 1040 trivial. 0 not checked. [2022-11-19 07:53:31,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:53:31,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642016481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:31,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:53:31,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:53:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932171142] [2022-11-19 07:53:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:31,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:53:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:53:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:53:31,936 INFO L87 Difference]: Start difference. First operand 28979 states and 39373 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (59), 3 states have call predecessors, (59), 3 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2022-11-19 07:53:36,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:38,345 INFO L93 Difference]: Finished difference Result 60255 states and 82167 transitions. [2022-11-19 07:53:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:53:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (59), 3 states have call predecessors, (59), 3 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) Word has length 477 [2022-11-19 07:53:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:38,494 INFO L225 Difference]: With dead ends: 60255 [2022-11-19 07:53:38,495 INFO L226 Difference]: Without dead ends: 39120 [2022-11-19 07:53:38,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:53:38,549 INFO L413 NwaCegarLoop]: 1478 mSDtfsCounter, 1119 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2662 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:38,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 2662 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 466 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 07:53:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39120 states. [2022-11-19 07:53:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39120 to 39082. [2022-11-19 07:53:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39082 states, 25270 states have (on average 1.2941828254847645) internal successors, (32704), 25660 states have internal predecessors, (32704), 10213 states have call successors, (10213), 3598 states have call predecessors, (10213), 3598 states have return successors, (10279), 9901 states have call predecessors, (10279), 10213 states have call successors, (10279) [2022-11-19 07:53:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39082 states to 39082 states and 53196 transitions. [2022-11-19 07:53:41,266 INFO L78 Accepts]: Start accepts. Automaton has 39082 states and 53196 transitions. Word has length 477 [2022-11-19 07:53:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:41,267 INFO L495 AbstractCegarLoop]: Abstraction has 39082 states and 53196 transitions. [2022-11-19 07:53:41,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 3 states have call successors, (59), 3 states have call predecessors, (59), 3 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2022-11-19 07:53:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39082 states and 53196 transitions. [2022-11-19 07:53:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-11-19 07:53:41,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:41,317 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:41,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:41,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:41,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash -29864488, now seen corresponding path program 1 times [2022-11-19 07:53:41,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:41,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102734882] [2022-11-19 07:53:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:41,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1438 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2022-11-19 07:53:42,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:42,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102734882] [2022-11-19 07:53:42,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102734882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:53:42,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384436619] [2022-11-19 07:53:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:42,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:42,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:42,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:43,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:53:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:45,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 8453 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:53:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1438 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2022-11-19 07:53:45,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:53:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384436619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:45,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:53:45,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-19 07:53:45,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854119580] [2022-11-19 07:53:45,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:45,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:53:45,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:53:45,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:53:45,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:53:45,147 INFO L87 Difference]: Start difference. First operand 39082 states and 53196 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-19 07:53:49,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:53:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:52,793 INFO L93 Difference]: Finished difference Result 86366 states and 117534 transitions. [2022-11-19 07:53:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:53:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 494 [2022-11-19 07:53:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:52,963 INFO L225 Difference]: With dead ends: 86366 [2022-11-19 07:53:52,964 INFO L226 Difference]: Without dead ends: 47368 [2022-11-19 07:53:53,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:53:53,052 INFO L413 NwaCegarLoop]: 1519 mSDtfsCounter, 613 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:53,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 3925 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1090 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-19 07:53:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47368 states. [2022-11-19 07:53:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47368 to 47302. [2022-11-19 07:53:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47302 states, 30754 states have (on average 1.2958314365610977) internal successors, (39852), 31296 states have internal predecessors, (39852), 12101 states have call successors, (12101), 4446 states have call predecessors, (12101), 4446 states have return successors, (12167), 11661 states have call predecessors, (12167), 12101 states have call successors, (12167) [2022-11-19 07:53:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47302 states to 47302 states and 64120 transitions. [2022-11-19 07:53:55,836 INFO L78 Accepts]: Start accepts. Automaton has 47302 states and 64120 transitions. Word has length 494 [2022-11-19 07:53:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:55,838 INFO L495 AbstractCegarLoop]: Abstraction has 47302 states and 64120 transitions. [2022-11-19 07:53:55,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-19 07:53:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 47302 states and 64120 transitions. [2022-11-19 07:53:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-11-19 07:53:55,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:55,871 INFO L195 NwaCegarLoop]: trace histogram [22, 14, 14, 14, 14, 14, 14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:55,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:56,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:56,086 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:56,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 528184544, now seen corresponding path program 1 times [2022-11-19 07:53:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:56,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575878889] [2022-11-19 07:53:56,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:56,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1412 trivial. 0 not checked. [2022-11-19 07:53:57,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:57,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575878889] [2022-11-19 07:53:57,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575878889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:53:57,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513725179] [2022-11-19 07:53:57,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:57,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:57,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:57,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:53:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 8364 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:53:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2022-11-19 07:53:59,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:53:59,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513725179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:53:59,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:53:59,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:53:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033539973] [2022-11-19 07:53:59,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:53:59,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:54:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:54:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:54:00,001 INFO L87 Difference]: Start difference. First operand 47302 states and 64120 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-19 07:54:03,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:54:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:07,303 INFO L93 Difference]: Finished difference Result 99450 states and 135508 transitions. [2022-11-19 07:54:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:54:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 491 [2022-11-19 07:54:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:07,585 INFO L225 Difference]: With dead ends: 99450 [2022-11-19 07:54:07,585 INFO L226 Difference]: Without dead ends: 61280 [2022-11-19 07:54:07,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:54:07,661 INFO L413 NwaCegarLoop]: 1398 mSDtfsCounter, 1022 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:07,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 2465 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-19 07:54:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61280 states. [2022-11-19 07:54:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61280 to 61264. [2022-11-19 07:54:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61264 states, 40112 states have (on average 1.2884922217790187) internal successors, (51684), 40846 states have internal predecessors, (51684), 15463 states have call successors, (15463), 5688 states have call predecessors, (15463), 5688 states have return successors, (15565), 14851 states have call predecessors, (15565), 15463 states have call successors, (15565) [2022-11-19 07:54:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61264 states to 61264 states and 82712 transitions. [2022-11-19 07:54:10,951 INFO L78 Accepts]: Start accepts. Automaton has 61264 states and 82712 transitions. Word has length 491 [2022-11-19 07:54:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:10,956 INFO L495 AbstractCegarLoop]: Abstraction has 61264 states and 82712 transitions. [2022-11-19 07:54:10,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 3 states have call successors, (61), 3 states have call predecessors, (61), 3 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2022-11-19 07:54:10,956 INFO L276 IsEmpty]: Start isEmpty. Operand 61264 states and 82712 transitions. [2022-11-19 07:54:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-11-19 07:54:10,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:10,987 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 15, 14, 14, 14, 14, 14, 14, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:54:11,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:54:11,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash -442545895, now seen corresponding path program 1 times [2022-11-19 07:54:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:11,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443131565] [2022-11-19 07:54:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:11,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2022-11-19 07:54:12,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443131565] [2022-11-19 07:54:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443131565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:54:12,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835403776] [2022-11-19 07:54:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:12,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:54:12,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d561278-0521-4e24-8a3f-56c248623634/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:54:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 8810 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:54:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:54:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-11-19 07:54:14,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:54:14,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835403776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:14,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:54:14,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:54:14,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910074535] [2022-11-19 07:54:14,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:14,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:54:14,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:54:14,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:54:14,979 INFO L87 Difference]: Start difference. First operand 61264 states and 82712 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2022-11-19 07:54:18,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []