./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI --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 7001fc39e766418166b5245dd523731096962c63b3f1d8b8399a7fc1e7a88c5f --- 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-5e519f3 [2022-11-03 02:07:35,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:07:35,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:07:35,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:07:35,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:07:35,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:07:35,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:07:35,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:07:35,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:07:35,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:07:35,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:07:35,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:07:35,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:07:35,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:07:35,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:07:35,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:07:35,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:07:35,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:07:35,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:07:35,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:07:35,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:07:35,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:07:35,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:07:35,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:07:35,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:07:35,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:07:35,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:07:35,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:07:35,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:07:35,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:07:35,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:07:35,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:07:35,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:07:35,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:07:35,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:07:35,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:07:35,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:07:35,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:07:35,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:07:35,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:07:35,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:07:35,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:07:35,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:07:35,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:07:35,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:07:35,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:07:35,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:07:35,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:07:35,325 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:07:35,325 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:07:35,326 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:07:35,326 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:07:35,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:07:35,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:07:35,328 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:07:35,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:07:35,329 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:07:35,329 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:07:35,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:07:35,330 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:07:35,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:07:35,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:07:35,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:07:35,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:07:35,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:07:35,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:07:35,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:07:35,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:07:35,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:07:35,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:07:35,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:07:35,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:35,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:07:35,338 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:07:35,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:07:35,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:07:35,339 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:07:35,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:07:35,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:07:35,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:07:35,340 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_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7001fc39e766418166b5245dd523731096962c63b3f1d8b8399a7fc1e7a88c5f [2022-11-03 02:07:35,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:07:35,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:07:35,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:07:35,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:07:35,763 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:07:35,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2022-11-03 02:07:35,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/data/6ec2e6249/6991e439023d4a58b6933869095f65a6/FLAGb9b044fe0 [2022-11-03 02:07:37,010 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:07:37,011 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2022-11-03 02:07:37,067 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/data/6ec2e6249/6991e439023d4a58b6933869095f65a6/FLAGb9b044fe0 [2022-11-03 02:07:37,402 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/data/6ec2e6249/6991e439023d4a58b6933869095f65a6 [2022-11-03 02:07:37,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:07:37,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:07:37,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:37,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:07:37,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:07:37,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:37" (1/1) ... [2022-11-03 02:07:37,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44133024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:37, skipping insertion in model container [2022-11-03 02:07:37,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:07:37" (1/1) ... [2022-11-03 02:07:37,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:07:37,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:07:38,556 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6037] [2022-11-03 02:07:38,557 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6038-6039] [2022-11-03 02:07:39,109 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i[185861,185874] [2022-11-03 02:07:40,627 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-03 02:07:40,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:40,705 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:07:40,955 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6037] [2022-11-03 02:07:40,955 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6038-6039] [2022-11-03 02:07:40,971 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i[185861,185874] [2022-11-03 02:07:41,399 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-03 02:07:41,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:07:41,522 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:07:41,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41 WrapperNode [2022-11-03 02:07:41,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:07:41,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:41,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:07:41,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:07:41,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:41,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:41,960 INFO L138 Inliner]: procedures = 259, calls = 2016, calls flagged for inlining = 128, calls inlined = 102, statements flattened = 4816 [2022-11-03 02:07:41,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:07:41,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:07:41,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:07:41,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:07:41,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:41,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,374 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:07:42,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:07:42,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:07:42,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:07:42,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (1/1) ... [2022-11-03 02:07:42,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:07:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:42,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:07:42,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:07:42,540 INFO L130 BoogieDeclarations]: Found specification of procedure he_remove_one [2022-11-03 02:07:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure he_remove_one [2022-11-03 02:07:42,540 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-03 02:07:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-03 02:07:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2022-11-03 02:07:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2022-11-03 02:07:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-03 02:07:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:07:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:07:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure he_close [2022-11-03 02:07:42,543 INFO L138 BoogieDeclarations]: Found implementation of procedure he_close [2022-11-03 02:07:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_alloc [2022-11-03 02:07:42,543 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_alloc [2022-11-03 02:07:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:07:42,544 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:07:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-03 02:07:42,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-03 02:07:42,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:07:42,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:07:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure he_phy_get [2022-11-03 02:07:42,545 INFO L138 BoogieDeclarations]: Found implementation of procedure he_phy_get [2022-11-03 02:07:42,545 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2022-11-03 02:07:42,546 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2022-11-03 02:07:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2022-11-03 02:07:42,546 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2022-11-03 02:07:42,546 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_tpd [2022-11-03 02:07:42,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_tpd [2022-11-03 02:07:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure rate_to_atmf [2022-11-03 02:07:42,547 INFO L138 BoogieDeclarations]: Found implementation of procedure rate_to_atmf [2022-11-03 02:07:42,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:07:42,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:07:42,548 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-03 02:07:42,548 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-03 02:07:42,548 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 02:07:42,549 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 02:07:42,549 INFO L130 BoogieDeclarations]: Found specification of procedure he_phy_put [2022-11-03 02:07:42,549 INFO L138 BoogieDeclarations]: Found implementation of procedure he_phy_put [2022-11-03 02:07:42,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:07:42,550 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:07:42,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:07:42,550 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:07:42,551 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-03 02:07:42,551 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-03 02:07:42,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:07:42,551 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:07:42,552 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:07:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:07:42,552 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_create [2022-11-03 02:07:42,552 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_create [2022-11-03 02:07:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-03 02:07:42,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-03 02:07:42,553 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 02:07:42,553 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 02:07:42,554 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_destroy [2022-11-03 02:07:42,554 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_destroy [2022-11-03 02:07:42,554 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-03 02:07:42,554 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-03 02:07:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure he_readl_internal [2022-11-03 02:07:42,555 INFO L138 BoogieDeclarations]: Found implementation of procedure he_readl_internal [2022-11-03 02:07:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:07:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:07:42,556 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-03 02:07:42,556 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-03 02:07:42,556 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2022-11-03 02:07:42,556 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2022-11-03 02:07:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2022-11-03 02:07:42,557 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2022-11-03 02:07:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:07:42,557 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:07:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure he_send [2022-11-03 02:07:42,558 INFO L138 BoogieDeclarations]: Found implementation of procedure he_send [2022-11-03 02:07:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2022-11-03 02:07:42,558 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2022-11-03 02:07:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 02:07:42,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 02:07:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-03 02:07:42,559 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-03 02:07:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2022-11-03 02:07:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2022-11-03 02:07:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-03 02:07:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-03 02:07:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure he_writel_internal [2022-11-03 02:07:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure he_writel_internal [2022-11-03 02:07:42,561 INFO L130 BoogieDeclarations]: Found specification of procedure he_ioctl [2022-11-03 02:07:42,561 INFO L138 BoogieDeclarations]: Found implementation of procedure he_ioctl [2022-11-03 02:07:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:07:42,562 INFO L130 BoogieDeclarations]: Found specification of procedure he_open [2022-11-03 02:07:42,562 INFO L138 BoogieDeclarations]: Found implementation of procedure he_open [2022-11-03 02:07:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-03 02:07:42,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-03 02:07:42,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-03 02:07:42,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-03 02:07:42,564 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:07:42,564 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:07:42,564 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-03 02:07:42,564 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-03 02:07:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-03 02:07:42,565 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-03 02:07:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:07:42,565 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-03 02:07:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-03 02:07:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure he_stop [2022-11-03 02:07:42,566 INFO L138 BoogieDeclarations]: Found implementation of procedure he_stop [2022-11-03 02:07:42,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:07:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:07:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:07:42,567 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-03 02:07:42,567 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-03 02:07:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure __enqueue_tpd [2022-11-03 02:07:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __enqueue_tpd [2022-11-03 02:07:42,568 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-03 02:07:42,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-03 02:07:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:07:42,569 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2022-11-03 02:07:42,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2022-11-03 02:07:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-03 02:07:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-03 02:07:42,570 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-03 02:07:42,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-03 02:07:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:07:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2022-11-03 02:07:42,571 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2022-11-03 02:07:42,571 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:07:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-03 02:07:42,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-03 02:07:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-03 02:07:42,572 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-03 02:07:42,572 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:07:42,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:07:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-03 02:07:42,573 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-03 02:07:42,573 INFO L130 BoogieDeclarations]: Found specification of procedure atm_dev_deregister [2022-11-03 02:07:42,574 INFO L138 BoogieDeclarations]: Found implementation of procedure atm_dev_deregister [2022-11-03 02:07:42,574 INFO L130 BoogieDeclarations]: Found specification of procedure read_prom_byte [2022-11-03 02:07:42,574 INFO L138 BoogieDeclarations]: Found implementation of procedure read_prom_byte [2022-11-03 02:07:42,574 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-03 02:07:42,575 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-03 02:07:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-03 02:07:42,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-03 02:07:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-03 02:07:42,576 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-03 02:07:42,576 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 02:07:42,576 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 02:07:42,576 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2022-11-03 02:07:42,576 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2022-11-03 02:07:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:07:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-11-03 02:07:42,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-11-03 02:07:42,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:07:42,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:07:42,578 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2022-11-03 02:07:42,578 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2022-11-03 02:07:43,612 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:07:43,616 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:07:44,372 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:07:49,460 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:07:51,131 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:07:51,131 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:07:51,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:51 BoogieIcfgContainer [2022-11-03 02:07:51,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:07:51,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:07:51,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:07:51,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:07:51,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:07:37" (1/3) ... [2022-11-03 02:07:51,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9cc140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:51, skipping insertion in model container [2022-11-03 02:07:51,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:07:41" (2/3) ... [2022-11-03 02:07:51,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9cc140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:07:51, skipping insertion in model container [2022-11-03 02:07:51,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:07:51" (3/3) ... [2022-11-03 02:07:51,152 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2022-11-03 02:07:51,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:07:51,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:07:51,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:07:51,302 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;@224cc170, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:07:51,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:07:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 1352 states, 772 states have (on average 1.2953367875647668) internal successors, (1000), 795 states have internal predecessors, (1000), 510 states have call successors, (510), 69 states have call predecessors, (510), 68 states have return successors, (504), 499 states have call predecessors, (504), 504 states have call successors, (504) [2022-11-03 02:07:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:07:51,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:51,362 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:51,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2091646374, now seen corresponding path program 1 times [2022-11-03 02:07:51,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:51,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209725096] [2022-11-03 02:07:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:51,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:07:52,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209725096] [2022-11-03 02:07:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209725096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:52,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:52,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376180304] [2022-11-03 02:07:52,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:52,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:07:52,251 INFO L87 Difference]: Start difference. First operand has 1352 states, 772 states have (on average 1.2953367875647668) internal successors, (1000), 795 states have internal predecessors, (1000), 510 states have call successors, (510), 69 states have call predecessors, (510), 68 states have return successors, (504), 499 states have call predecessors, (504), 504 states have call successors, (504) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:07:55,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:07:57,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:07:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:58,227 INFO L93 Difference]: Finished difference Result 3222 states and 4796 transitions. [2022-11-03 02:07:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:07:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-03 02:07:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:58,265 INFO L225 Difference]: With dead ends: 3222 [2022-11-03 02:07:58,265 INFO L226 Difference]: Without dead ends: 1860 [2022-11-03 02:07:58,282 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 [2022-11-03 02:07:58,286 INFO L413 NwaCegarLoop]: 2169 mSDtfsCounter, 766 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 3955 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 389 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:07:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-03 02:07:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1850. [2022-11-03 02:07:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1075 states have (on average 1.2855813953488373) internal successors, (1382), 1095 states have internal predecessors, (1382), 668 states have call successors, (668), 108 states have call predecessors, (668), 106 states have return successors, (667), 658 states have call predecessors, (667), 667 states have call successors, (667) [2022-11-03 02:07:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2717 transitions. [2022-11-03 02:07:58,601 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2717 transitions. Word has length 56 [2022-11-03 02:07:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:58,604 INFO L495 AbstractCegarLoop]: Abstraction has 1850 states and 2717 transitions. [2022-11-03 02:07:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:07:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2717 transitions. [2022-11-03 02:07:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:07:58,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:58,610 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:58,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:07:58,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:07:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1088288041, now seen corresponding path program 1 times [2022-11-03 02:07:58,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321538632] [2022-11-03 02:07:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:58,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:07:58,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321538632] [2022-11-03 02:07:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321538632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:58,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:58,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:07:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033818960] [2022-11-03 02:07:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:07:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:07:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:07:58,877 INFO L87 Difference]: Start difference. First operand 1850 states and 2717 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:08:02,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:04,515 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 [] [2022-11-03 02:08:04,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:04,788 INFO L93 Difference]: Finished difference Result 4379 states and 6411 transitions. [2022-11-03 02:08:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-11-03 02:08:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:04,811 INFO L225 Difference]: With dead ends: 4379 [2022-11-03 02:08:04,812 INFO L226 Difference]: Without dead ends: 2540 [2022-11-03 02:08:04,823 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 [2022-11-03 02:08:04,825 INFO L413 NwaCegarLoop]: 2369 mSDtfsCounter, 901 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:04,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 4170 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 385 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 02:08:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-03 02:08:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2537. [2022-11-03 02:08:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 1500 states have (on average 1.306) internal successors, (1959), 1533 states have internal predecessors, (1959), 874 states have call successors, (874), 164 states have call predecessors, (874), 162 states have return successors, (873), 860 states have call predecessors, (873), 873 states have call successors, (873) [2022-11-03 02:08:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3706 transitions. [2022-11-03 02:08:05,247 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3706 transitions. Word has length 55 [2022-11-03 02:08:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:05,248 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 3706 transitions. [2022-11-03 02:08:05,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:08:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3706 transitions. [2022-11-03 02:08:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:08:05,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:05,253 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-11-03 02:08:05,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:08:05,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:05,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:05,254 INFO L85 PathProgramCache]: Analyzing trace with hash 23852923, now seen corresponding path program 1 times [2022-11-03 02:08:05,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:05,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330229056] [2022-11-03 02:08:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:08:05,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330229056] [2022-11-03 02:08:05,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330229056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:05,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:05,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501812436] [2022-11-03 02:08:05,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:05,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:05,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:05,612 INFO L87 Difference]: Start difference. First operand 2537 states and 3706 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:08:08,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:10,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:11,303 INFO L93 Difference]: Finished difference Result 3828 states and 5563 transitions. [2022-11-03 02:08:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 70 [2022-11-03 02:08:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:11,342 INFO L225 Difference]: With dead ends: 3828 [2022-11-03 02:08:11,342 INFO L226 Difference]: Without dead ends: 3825 [2022-11-03 02:08:11,347 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 [2022-11-03 02:08:11,348 INFO L413 NwaCegarLoop]: 2019 mSDtfsCounter, 955 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3695 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:11,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 3695 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 02:08:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2022-11-03 02:08:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3778. [2022-11-03 02:08:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 2321 states have (on average 1.3162429987074538) internal successors, (3055), 2361 states have internal predecessors, (3055), 1190 states have call successors, (1190), 269 states have call predecessors, (1190), 266 states have return successors, (1232), 1172 states have call predecessors, (1232), 1189 states have call successors, (1232) [2022-11-03 02:08:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 5477 transitions. [2022-11-03 02:08:11,861 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 5477 transitions. Word has length 70 [2022-11-03 02:08:11,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:11,865 INFO L495 AbstractCegarLoop]: Abstraction has 3778 states and 5477 transitions. [2022-11-03 02:08:11,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:08:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 5477 transitions. [2022-11-03 02:08:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:08:11,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:11,876 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2022-11-03 02:08:11,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:08:11,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash 675735805, now seen corresponding path program 1 times [2022-11-03 02:08:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:11,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305657575] [2022-11-03 02:08:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:11,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:08:12,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:12,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305657575] [2022-11-03 02:08:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305657575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:12,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:12,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987991188] [2022-11-03 02:08:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:12,289 INFO L87 Difference]: Start difference. First operand 3778 states and 5477 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:08:15,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:18,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:18,415 INFO L93 Difference]: Finished difference Result 9243 states and 13329 transitions. [2022-11-03 02:08:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:18,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 112 [2022-11-03 02:08:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:18,465 INFO L225 Difference]: With dead ends: 9243 [2022-11-03 02:08:18,465 INFO L226 Difference]: Without dead ends: 5484 [2022-11-03 02:08:18,489 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 [2022-11-03 02:08:18,490 INFO L413 NwaCegarLoop]: 2289 mSDtfsCounter, 1022 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 4062 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:18,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 4062 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 421 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 02:08:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2022-11-03 02:08:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5463. [2022-11-03 02:08:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 3401 states have (on average 1.3099088503381358) internal successors, (4455), 3458 states have internal predecessors, (4455), 1648 states have call successors, (1648), 418 states have call predecessors, (1648), 413 states have return successors, (1707), 1623 states have call predecessors, (1707), 1647 states have call successors, (1707) [2022-11-03 02:08:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7810 transitions. [2022-11-03 02:08:18,943 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7810 transitions. Word has length 112 [2022-11-03 02:08:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:18,944 INFO L495 AbstractCegarLoop]: Abstraction has 5463 states and 7810 transitions. [2022-11-03 02:08:18,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-03 02:08:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7810 transitions. [2022-11-03 02:08:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 02:08:18,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:18,951 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2022-11-03 02:08:18,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:08:18,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 483497087, now seen corresponding path program 1 times [2022-11-03 02:08:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392511173] [2022-11-03 02:08:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:08:20,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392511173] [2022-11-03 02:08:20,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392511173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:20,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:20,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:08:20,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622664403] [2022-11-03 02:08:20,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:20,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:08:20,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:08:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:20,123 INFO L87 Difference]: Start difference. First operand 5463 states and 7810 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:08:24,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:26,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:26,851 INFO L93 Difference]: Finished difference Result 12421 states and 18046 transitions. [2022-11-03 02:08:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:08:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2022-11-03 02:08:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:26,911 INFO L225 Difference]: With dead ends: 12421 [2022-11-03 02:08:26,911 INFO L226 Difference]: Without dead ends: 6977 [2022-11-03 02:08:26,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:26,949 INFO L413 NwaCegarLoop]: 2156 mSDtfsCounter, 232 mSDsluCounter, 6717 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 8343 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:26,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 8343 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 738 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 02:08:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2022-11-03 02:08:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 5487. [2022-11-03 02:08:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 3419 states have (on average 1.3082772740567417) internal successors, (4473), 3476 states have internal predecessors, (4473), 1648 states have call successors, (1648), 418 states have call predecessors, (1648), 419 states have return successors, (1730), 1629 states have call predecessors, (1730), 1647 states have call successors, (1730) [2022-11-03 02:08:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 7851 transitions. [2022-11-03 02:08:27,558 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 7851 transitions. Word has length 111 [2022-11-03 02:08:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:27,559 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 7851 transitions. [2022-11-03 02:08:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:08:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 7851 transitions. [2022-11-03 02:08:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:08:27,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:27,565 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2022-11-03 02:08:27,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:08:27,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -629352240, now seen corresponding path program 1 times [2022-11-03 02:08:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:27,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782308184] [2022-11-03 02:08:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:08:29,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:29,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782308184] [2022-11-03 02:08:29,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782308184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:29,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:08:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217710221] [2022-11-03 02:08:29,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:08:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:08:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:08:29,805 INFO L87 Difference]: Start difference. First operand 5487 states and 7851 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 02:08:36,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:38,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:39,313 INFO L93 Difference]: Finished difference Result 13519 states and 19876 transitions. [2022-11-03 02:08:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:08:39,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-11-03 02:08:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:39,417 INFO L225 Difference]: With dead ends: 13519 [2022-11-03 02:08:39,418 INFO L226 Difference]: Without dead ends: 8051 [2022-11-03 02:08:39,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:08:39,453 INFO L413 NwaCegarLoop]: 2106 mSDtfsCounter, 1054 mSDsluCounter, 11114 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 245 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 12344 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:39,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 12344 Invalid, 1454 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [245 Valid, 1207 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2022-11-03 02:08:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2022-11-03 02:08:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5723. [2022-11-03 02:08:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 3561 states have (on average 1.306093793878124) internal successors, (4651), 3618 states have internal predecessors, (4651), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2022-11-03 02:08:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 8220 transitions. [2022-11-03 02:08:40,107 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 8220 transitions. Word has length 115 [2022-11-03 02:08:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:40,109 INFO L495 AbstractCegarLoop]: Abstraction has 5723 states and 8220 transitions. [2022-11-03 02:08:40,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-03 02:08:40,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 8220 transitions. [2022-11-03 02:08:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:08:40,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:40,117 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2022-11-03 02:08:40,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:08:40,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash -149857921, now seen corresponding path program 1 times [2022-11-03 02:08:40,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:40,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058672077] [2022-11-03 02:08:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:40,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 02:08:40,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058672077] [2022-11-03 02:08:40,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058672077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:40,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:40,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:08:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582313168] [2022-11-03 02:08:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:40,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:08:40,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:08:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:40,637 INFO L87 Difference]: Start difference. First operand 5723 states and 8220 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:08:43,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:46,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:47,742 INFO L93 Difference]: Finished difference Result 13093 states and 19144 transitions. [2022-11-03 02:08:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:08:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2022-11-03 02:08:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:47,794 INFO L225 Difference]: With dead ends: 13093 [2022-11-03 02:08:47,795 INFO L226 Difference]: Without dead ends: 7389 [2022-11-03 02:08:47,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:08:47,830 INFO L413 NwaCegarLoop]: 2059 mSDtfsCounter, 426 mSDsluCounter, 4204 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 5919 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:47,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 5919 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 543 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 02:08:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-11-03 02:08:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 5739. [2022-11-03 02:08:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5739 states, 3577 states have (on average 1.3047246295778585) internal successors, (4667), 3634 states have internal predecessors, (4667), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2022-11-03 02:08:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 8236 transitions. [2022-11-03 02:08:48,371 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 8236 transitions. Word has length 121 [2022-11-03 02:08:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:48,371 INFO L495 AbstractCegarLoop]: Abstraction has 5739 states and 8236 transitions. [2022-11-03 02:08:48,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:08:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 8236 transitions. [2022-11-03 02:08:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-03 02:08:48,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:48,387 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 4, 3, 3, 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] [2022-11-03 02:08:48,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:08:48,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash 71703760, now seen corresponding path program 1 times [2022-11-03 02:08:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:48,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087000588] [2022-11-03 02:08:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:08:49,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:49,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087000588] [2022-11-03 02:08:49,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087000588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:49,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:08:49,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:08:49,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391089808] [2022-11-03 02:08:49,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:49,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:08:49,016 INFO L87 Difference]: Start difference. First operand 5739 states and 8236 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:08:51,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:08:54,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:08:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:55,361 INFO L93 Difference]: Finished difference Result 11515 states and 16542 transitions. [2022-11-03 02:08:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:08:55,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 241 [2022-11-03 02:08:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:55,398 INFO L225 Difference]: With dead ends: 11515 [2022-11-03 02:08:55,398 INFO L226 Difference]: Without dead ends: 5795 [2022-11-03 02:08:55,423 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 [2022-11-03 02:08:55,423 INFO L413 NwaCegarLoop]: 1818 mSDtfsCounter, 4 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:55,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3620 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 02:08:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2022-11-03 02:08:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5759. [2022-11-03 02:08:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 3597 states have (on average 1.303030303030303) internal successors, (4687), 3654 states have internal predecessors, (4687), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2022-11-03 02:08:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 8256 transitions. [2022-11-03 02:08:55,910 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 8256 transitions. Word has length 241 [2022-11-03 02:08:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:55,911 INFO L495 AbstractCegarLoop]: Abstraction has 5759 states and 8256 transitions. [2022-11-03 02:08:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:08:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 8256 transitions. [2022-11-03 02:08:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-03 02:08:55,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:55,925 INFO L195 NwaCegarLoop]: trace histogram [14, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:55,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:08:55,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:55,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1030718864, now seen corresponding path program 1 times [2022-11-03 02:08:55,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:55,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031228743] [2022-11-03 02:08:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:55,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-11-03 02:08:56,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031228743] [2022-11-03 02:08:56,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031228743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:56,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939501555] [2022-11-03 02:08:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:56,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:56,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:56,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:56,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:08:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 3199 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:08:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-11-03 02:08:58,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:08:58,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939501555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:08:58,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:08:58,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-03 02:08:58,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679773418] [2022-11-03 02:08:58,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:08:58,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:08:58,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:08:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:08:58,227 INFO L87 Difference]: Start difference. First operand 5759 states and 8256 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:09:01,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:09:03,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:04,074 INFO L93 Difference]: Finished difference Result 11619 states and 16698 transitions. [2022-11-03 02:09:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 297 [2022-11-03 02:09:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:04,108 INFO L225 Difference]: With dead ends: 11619 [2022-11-03 02:09:04,108 INFO L226 Difference]: Without dead ends: 5879 [2022-11-03 02:09:04,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:09:04,136 INFO L413 NwaCegarLoop]: 1829 mSDtfsCounter, 9 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:04,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3640 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 343 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 02:09:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2022-11-03 02:09:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 5771. [2022-11-03 02:09:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5771 states, 3609 states have (on average 1.3020227209753394) internal successors, (4699), 3666 states have internal predecessors, (4699), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2022-11-03 02:09:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 8268 transitions. [2022-11-03 02:09:04,715 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 8268 transitions. Word has length 297 [2022-11-03 02:09:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:04,716 INFO L495 AbstractCegarLoop]: Abstraction has 5771 states and 8268 transitions. [2022-11-03 02:09:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-03 02:09:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 8268 transitions. [2022-11-03 02:09:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-03 02:09:04,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:04,738 INFO L195 NwaCegarLoop]: trace histogram [26, 15, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:04,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:04,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:09:04,960 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:04,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1112110004, now seen corresponding path program 1 times [2022-11-03 02:09:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560476383] [2022-11-03 02:09:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:04,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-11-03 02:09:05,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560476383] [2022-11-03 02:09:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560476383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20953714] [2022-11-03 02:09:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:05,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:05,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:05,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fe1008e-5196-4a8a-83fd-0ca70a79e04b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:09:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 3679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:09:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 344 proven. 1 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-11-03 02:09:07,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-11-03 02:09:08,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20953714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192882702] [2022-11-03 02:09:08,557 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2022-11-03 02:09:08,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:09:08,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:09:08,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:09:08,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs