./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V --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 5257f81555b3bfe28b84a069de5704350960a2d031d6c4979181f2692dbf025e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:54:36,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:54:36,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:54:36,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:54:36,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:54:36,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:54:36,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:54:36,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:54:36,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:54:36,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:54:36,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:54:36,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:54:36,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:54:36,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:54:36,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:54:36,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:54:36,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:54:36,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:54:36,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:54:36,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:54:36,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:54:36,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:54:36,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:54:36,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:54:36,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:54:36,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:54:36,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:54:36,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:54:36,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:54:36,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:54:36,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:54:36,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:54:36,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:54:36,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:54:36,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:54:36,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:54:36,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:54:36,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:54:36,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:54:36,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:54:36,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:54:36,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:54:36,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:54:36,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:54:36,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:54:36,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:54:36,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:54:36,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:54:36,481 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:54:36,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:54:36,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:54:36,482 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:54:36,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:54:36,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:54:36,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:54:36,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:54:36,483 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:54:36,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:54:36,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:54:36,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:54:36,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:54:36,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:54:36,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:54:36,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:54:36,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:54:36,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:54:36,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:54:36,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:54:36,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:54:36,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:54:36,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:54:36,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:36,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:54:36,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:54:36,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:54:36,489 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:54:36,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:54:36,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:54:36,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:54:36,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:54:36,491 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5257f81555b3bfe28b84a069de5704350960a2d031d6c4979181f2692dbf025e [2021-11-23 03:54:36,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:54:36,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:54:36,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:54:36,819 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:54:36,820 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:54:36,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i [2021-11-23 03:54:36,925 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/data/31a0c4304/80dce3d6fc584031bc904bf985416e93/FLAG4852c1669 [2021-11-23 03:54:38,000 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:54:38,001 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i [2021-11-23 03:54:38,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/data/31a0c4304/80dce3d6fc584031bc904bf985416e93/FLAG4852c1669 [2021-11-23 03:54:38,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/data/31a0c4304/80dce3d6fc584031bc904bf985416e93 [2021-11-23 03:54:38,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:54:38,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:54:38,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:38,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:54:38,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:54:38,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:38" (1/1) ... [2021-11-23 03:54:38,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7de1bc2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:38, skipping insertion in model container [2021-11-23 03:54:38,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:38" (1/1) ... [2021-11-23 03:54:38,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:54:38,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:54:41,390 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_3d417fcc-0cb4-48f3-8d65-b607f599b65d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i[348142,348155] [2021-11-23 03:54:41,724 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 03:54:41,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:41,792 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:54:42,481 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_3d417fcc-0cb4-48f3-8d65-b607f599b65d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i[348142,348155] [2021-11-23 03:54:42,496 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 03:54:42,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:42,688 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:54:42,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42 WrapperNode [2021-11-23 03:54:42,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:42,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:42,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:54:42,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:54:42,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:42,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,254 INFO L137 Inliner]: procedures = 338, calls = 4513, calls flagged for inlining = 145, calls inlined = 135, statements flattened = 9533 [2021-11-23 03:54:43,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:43,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:54:43,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:54:43,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:54:43,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:54:43,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:54:43,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:54:43,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:54:43,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (1/1) ... [2021-11-23 03:54:43,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:43,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:54:43,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:54:43,930 INFO L130 BoogieDeclarations]: Found specification of procedure __scsi_print_sense [2021-11-23 03:54:43,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __scsi_print_sense [2021-11-23 03:54:43,930 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-23 03:54:43,930 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-23 03:54:43,930 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-23 03:54:43,931 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2021-11-23 03:54:43,931 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2021-11-23 03:54:43,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:54:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:54:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2021-11-23 03:54:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2021-11-23 03:54:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:54:43,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:54:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:54:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:54:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2021-11-23 03:54:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2021-11-23 03:54:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-23 03:54:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-23 03:54:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-23 03:54:43,934 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-23 03:54:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 03:54:43,934 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 03:54:43,934 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 03:54:43,935 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 03:54:43,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:54:43,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:54:43,935 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2021-11-23 03:54:43,935 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2021-11-23 03:54:43,936 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:54:43,936 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:54:43,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:54:43,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:54:43,937 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-23 03:54:43,937 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-23 03:54:43,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:54:43,937 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:54:43,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:54:43,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:54:43,938 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2021-11-23 03:54:43,938 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2021-11-23 03:54:43,938 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2021-11-23 03:54:43,939 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2021-11-23 03:54:43,939 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2021-11-23 03:54:43,939 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2021-11-23 03:54:43,940 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:54:43,940 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:54:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2021-11-23 03:54:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2021-11-23 03:54:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:54:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_read [2021-11-23 03:54:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_read [2021-11-23 03:54:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_st_ref_mutex [2021-11-23 03:54:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_st_ref_mutex [2021-11-23 03:54:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2021-11-23 03:54:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2021-11-23 03:54:43,943 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-23 03:54:43,943 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-23 03:54:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:54:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2021-11-23 03:54:43,944 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2021-11-23 03:54:43,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 03:54:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2021-11-23 03:54:43,945 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2021-11-23 03:54:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 03:54:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:54:43,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:54:43,945 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 03:54:43,946 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 03:54:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-23 03:54:43,946 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-23 03:54:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_inc [2021-11-23 03:54:43,947 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_inc [2021-11-23 03:54:43,947 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-23 03:54:43,948 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-23 03:54:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:54:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2021-11-23 03:54:43,948 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2021-11-23 03:54:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:54:43,948 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2021-11-23 03:54:43,949 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2021-11-23 03:54:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-23 03:54:43,950 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-23 03:54:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2021-11-23 03:54:43,950 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2021-11-23 03:54:43,950 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2021-11-23 03:54:43,951 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2021-11-23 03:54:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2021-11-23 03:54:43,952 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2021-11-23 03:54:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-23 03:54:43,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-23 03:54:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-23 03:54:43,954 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-23 03:54:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:54:43,954 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:54:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:54:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:54:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2021-11-23 03:54:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2021-11-23 03:54:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 03:54:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 03:54:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2021-11-23 03:54:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2021-11-23 03:54:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-11-23 03:54:43,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_scsi_tape [2021-11-23 03:54:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:54:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2021-11-23 03:54:43,957 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2021-11-23 03:54:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-23 03:54:43,959 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-23 03:54:43,962 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2021-11-23 03:54:43,962 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2021-11-23 03:54:43,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:54:43,962 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2021-11-23 03:54:43,964 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2021-11-23 03:54:43,965 INFO L130 BoogieDeclarations]: Found specification of procedure st_log_options [2021-11-23 03:54:43,965 INFO L138 BoogieDeclarations]: Found implementation of procedure st_log_options [2021-11-23 03:54:43,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:54:43,966 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2021-11-23 03:54:43,972 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2021-11-23 03:54:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2021-11-23 03:54:43,972 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2021-11-23 03:54:43,972 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2021-11-23 03:54:43,972 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2021-11-23 03:54:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2021-11-23 03:54:43,973 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2021-11-23 03:54:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:54:43,973 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:54:43,973 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2021-11-23 03:54:43,973 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2021-11-23 03:54:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-23 03:54:43,974 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-23 03:54:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2021-11-23 03:54:43,974 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2021-11-23 03:54:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:54:43,974 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:54:43,975 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2021-11-23 03:54:43,975 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2021-11-23 03:54:43,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:54:43,975 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 03:54:43,975 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 03:54:43,975 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 03:54:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 03:54:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:54:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:54:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-23 03:54:43,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-23 03:54:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:54:43,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:54:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_st_ref_mutex [2021-11-23 03:54:43,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_st_ref_mutex [2021-11-23 03:54:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:54:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:54:43,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:54:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 03:54:43,978 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 03:54:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:54:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure deb_space_print [2021-11-23 03:54:43,978 INFO L138 BoogieDeclarations]: Found implementation of procedure deb_space_print [2021-11-23 03:54:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 03:54:43,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 03:54:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-11-23 03:54:43,979 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-11-23 03:54:43,979 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-23 03:54:43,980 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-23 03:54:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:54:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:54:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2021-11-23 03:54:43,980 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2021-11-23 03:54:43,980 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2021-11-23 03:54:43,981 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2021-11-23 03:54:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-23 03:54:43,981 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-23 03:54:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-23 03:54:43,981 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-23 03:54:43,981 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2021-11-23 03:54:43,981 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2021-11-23 03:54:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush [2021-11-23 03:54:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush [2021-11-23 03:54:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 03:54:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 03:54:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2021-11-23 03:54:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2021-11-23 03:54:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-23 03:54:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-23 03:54:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-23 03:54:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-23 03:54:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-11-23 03:54:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_scsi_tape [2021-11-23 03:54:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure st_write [2021-11-23 03:54:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure st_write [2021-11-23 03:54:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 03:54:43,984 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 03:54:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:54:43,984 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2021-11-23 03:54:43,985 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2021-11-23 03:54:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2021-11-23 03:54:43,985 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2021-11-23 03:54:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:54:43,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:54:43,985 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:54:43,986 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:54:45,133 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:54:45,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:54:45,251 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:54:58,115 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:55:02,888 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:55:02,888 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:55:02,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:02 BoogieIcfgContainer [2021-11-23 03:55:02,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:55:02,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:55:02,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:55:02,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:55:02,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:38" (1/3) ... [2021-11-23 03:55:02,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc17a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:02, skipping insertion in model container [2021-11-23 03:55:02,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:42" (2/3) ... [2021-11-23 03:55:02,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc17a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:02, skipping insertion in model container [2021-11-23 03:55:02,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:02" (3/3) ... [2021-11-23 03:55:02,905 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--scsi--st.ko-entry_point.cil.out.i [2021-11-23 03:55:02,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:55:02,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:55:02,994 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:55:03,009 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:55:03,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:55:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 2040 states, 1388 states have (on average 1.442363112391931) internal successors, (2002), 1436 states have internal predecessors, (2002), 560 states have call successors, (560), 91 states have call predecessors, (560), 90 states have return successors, (537), 536 states have call predecessors, (537), 537 states have call successors, (537) [2021-11-23 03:55:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2021-11-23 03:55:03,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:03,158 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:03,159 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2000034131, now seen corresponding path program 1 times [2021-11-23 03:55:03,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:03,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486500788] [2021-11-23 03:55:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:03,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-23 03:55:05,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:05,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486500788] [2021-11-23 03:55:05,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486500788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:05,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:05,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:55:05,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294998914] [2021-11-23 03:55:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:05,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:05,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:05,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:05,453 INFO L87 Difference]: Start difference. First operand has 2040 states, 1388 states have (on average 1.442363112391931) internal successors, (2002), 1436 states have internal predecessors, (2002), 560 states have call successors, (560), 91 states have call predecessors, (560), 90 states have return successors, (537), 536 states have call predecessors, (537), 537 states have call successors, (537) Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:55:07,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:12,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:15,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:17,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:18,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:20,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:23,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:26,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:30,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:31,657 INFO L93 Difference]: Finished difference Result 5778 states and 8823 transitions. [2021-11-23 03:55:31,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:55:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 790 [2021-11-23 03:55:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:31,735 INFO L225 Difference]: With dead ends: 5778 [2021-11-23 03:55:31,736 INFO L226 Difference]: Without dead ends: 3825 [2021-11-23 03:55:31,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:31,759 INFO L933 BasicCegarLoop]: 3192 mSDtfsCounter, 2848 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2848 SdHoareTripleChecker+Valid, 5719 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:31,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2848 Valid, 5719 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 688 Invalid, 6 Unknown, 0 Unchecked, 25.8s Time] [2021-11-23 03:55:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-11-23 03:55:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3819. [2021-11-23 03:55:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3819 states, 2664 states have (on average 1.4365615615615615) internal successors, (3827), 2700 states have internal predecessors, (3827), 978 states have call successors, (978), 177 states have call predecessors, (978), 176 states have return successors, (969), 968 states have call predecessors, (969), 969 states have call successors, (969) [2021-11-23 03:55:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3819 states to 3819 states and 5774 transitions. [2021-11-23 03:55:32,133 INFO L78 Accepts]: Start accepts. Automaton has 3819 states and 5774 transitions. Word has length 790 [2021-11-23 03:55:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:32,137 INFO L470 AbstractCegarLoop]: Abstraction has 3819 states and 5774 transitions. [2021-11-23 03:55:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:55:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3819 states and 5774 transitions. [2021-11-23 03:55:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2021-11-23 03:55:32,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:32,178 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:32,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:55:32,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1784203052, now seen corresponding path program 1 times [2021-11-23 03:55:32,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:32,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145788698] [2021-11-23 03:55:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:32,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-23 03:55:33,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:33,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145788698] [2021-11-23 03:55:33,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145788698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:33,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:33,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:55:33,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674674996] [2021-11-23 03:55:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:33,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:33,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:33,227 INFO L87 Difference]: Start difference. First operand 3819 states and 5774 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-23 03:55:35,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:40,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:41,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:44,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:46,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:50,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:55:52,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:55,844 INFO L93 Difference]: Finished difference Result 10950 states and 16589 transitions. [2021-11-23 03:55:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:55:55,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) Word has length 794 [2021-11-23 03:55:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:55,922 INFO L225 Difference]: With dead ends: 10950 [2021-11-23 03:55:55,922 INFO L226 Difference]: Without dead ends: 7268 [2021-11-23 03:55:55,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:55,949 INFO L933 BasicCegarLoop]: 3112 mSDtfsCounter, 2608 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2622 SdHoareTripleChecker+Valid, 5798 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:55,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2622 Valid, 5798 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 693 Invalid, 6 Unknown, 0 Unchecked, 22.3s Time] [2021-11-23 03:55:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7268 states. [2021-11-23 03:55:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7268 to 7239. [2021-11-23 03:55:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7239 states, 5096 states have (on average 1.4452511773940346) internal successors, (7365), 5160 states have internal predecessors, (7365), 1800 states have call successors, (1800), 343 states have call predecessors, (1800), 342 states have return successors, (1819), 1782 states have call predecessors, (1819), 1791 states have call successors, (1819) [2021-11-23 03:55:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7239 states to 7239 states and 10984 transitions. [2021-11-23 03:55:56,440 INFO L78 Accepts]: Start accepts. Automaton has 7239 states and 10984 transitions. Word has length 794 [2021-11-23 03:55:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:56,444 INFO L470 AbstractCegarLoop]: Abstraction has 7239 states and 10984 transitions. [2021-11-23 03:55:56,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (74), 2 states have call predecessors, (74), 1 states have return successors, (72), 2 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-23 03:55:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 7239 states and 10984 transitions. [2021-11-23 03:55:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2021-11-23 03:55:56,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:56,459 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:56,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:55:56,460 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:56,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1870611276, now seen corresponding path program 1 times [2021-11-23 03:55:56,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:56,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299011175] [2021-11-23 03:55:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:56,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-23 03:55:57,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:57,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299011175] [2021-11-23 03:55:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299011175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:57,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:57,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:55:57,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981588325] [2021-11-23 03:55:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:57,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:57,280 INFO L87 Difference]: Start difference. First operand 7239 states and 10984 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:55:59,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:03,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:05,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:07,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:11,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:15,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:17,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:20,188 INFO L93 Difference]: Finished difference Result 7776 states and 11768 transitions. [2021-11-23 03:56:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 791 [2021-11-23 03:56:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:20,279 INFO L225 Difference]: With dead ends: 7776 [2021-11-23 03:56:20,280 INFO L226 Difference]: Without dead ends: 7773 [2021-11-23 03:56:20,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:20,291 INFO L933 BasicCegarLoop]: 3234 mSDtfsCounter, 2777 mSDsluCounter, 2822 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2791 SdHoareTripleChecker+Valid, 5717 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:20,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2791 Valid, 5717 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 704 Invalid, 7 Unknown, 0 Unchecked, 22.7s Time] [2021-11-23 03:56:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-11-23 03:56:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 7762. [2021-11-23 03:56:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7762 states, 5445 states have (on average 1.4420569329660238) internal successors, (7852), 5517 states have internal predecessors, (7852), 1926 states have call successors, (1926), 391 states have call predecessors, (1926), 390 states have return successors, (1977), 1902 states have call predecessors, (1977), 1917 states have call successors, (1977) [2021-11-23 03:56:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7762 states to 7762 states and 11755 transitions. [2021-11-23 03:56:20,880 INFO L78 Accepts]: Start accepts. Automaton has 7762 states and 11755 transitions. Word has length 791 [2021-11-23 03:56:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:20,883 INFO L470 AbstractCegarLoop]: Abstraction has 7762 states and 11755 transitions. [2021-11-23 03:56:20,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:56:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 7762 states and 11755 transitions. [2021-11-23 03:56:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2021-11-23 03:56:20,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:20,899 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:20,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:56:20,900 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2141492362, now seen corresponding path program 1 times [2021-11-23 03:56:20,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87092345] [2021-11-23 03:56:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:20,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-23 03:56:21,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:21,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87092345] [2021-11-23 03:56:21,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87092345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:21,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:21,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:56:21,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172075259] [2021-11-23 03:56:21,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:21,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:21,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:21,973 INFO L87 Difference]: Start difference. First operand 7762 states and 11755 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:56:24,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:27,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:30,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:32,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:33,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:35,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:36,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:38,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:40,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:43,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:46,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:48,149 INFO L93 Difference]: Finished difference Result 12161 states and 18317 transitions. [2021-11-23 03:56:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 792 [2021-11-23 03:56:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:48,287 INFO L225 Difference]: With dead ends: 12161 [2021-11-23 03:56:48,287 INFO L226 Difference]: Without dead ends: 12157 [2021-11-23 03:56:48,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:48,298 INFO L933 BasicCegarLoop]: 3200 mSDtfsCounter, 1781 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1789 SdHoareTripleChecker+Valid, 5653 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:48,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1789 Valid, 5653 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 729 Invalid, 7 Unknown, 0 Unchecked, 25.8s Time] [2021-11-23 03:56:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12157 states. [2021-11-23 03:56:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12157 to 12141. [2021-11-23 03:56:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12141 states, 8482 states have (on average 1.4363357698655976) internal successors, (12183), 8618 states have internal predecessors, (12183), 2998 states have call successors, (2998), 665 states have call predecessors, (2998), 660 states have return successors, (3113), 2946 states have call predecessors, (3113), 2989 states have call successors, (3113) [2021-11-23 03:56:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12141 states to 12141 states and 18294 transitions. [2021-11-23 03:56:48,987 INFO L78 Accepts]: Start accepts. Automaton has 12141 states and 18294 transitions. Word has length 792 [2021-11-23 03:56:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:48,989 INFO L470 AbstractCegarLoop]: Abstraction has 12141 states and 18294 transitions. [2021-11-23 03:56:48,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:56:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12141 states and 18294 transitions. [2021-11-23 03:56:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 794 [2021-11-23 03:56:48,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:48,999 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:49,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:56:49,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1962648689, now seen corresponding path program 1 times [2021-11-23 03:56:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789705051] [2021-11-23 03:56:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:49,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-23 03:56:49,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789705051] [2021-11-23 03:56:49,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789705051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:49,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:49,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:56:49,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283419208] [2021-11-23 03:56:49,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:49,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:49,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:56:49,777 INFO L87 Difference]: Start difference. First operand 12141 states and 18294 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:56:51,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:55,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:56,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:56:58,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:00,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:03,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:07,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:09,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:11,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:14,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:16,237 INFO L93 Difference]: Finished difference Result 24062 states and 36260 transitions. [2021-11-23 03:57:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:57:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 793 [2021-11-23 03:57:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:16,413 INFO L225 Difference]: With dead ends: 24062 [2021-11-23 03:57:16,413 INFO L226 Difference]: Without dead ends: 24059 [2021-11-23 03:57:16,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:16,431 INFO L933 BasicCegarLoop]: 3128 mSDtfsCounter, 2778 mSDsluCounter, 2830 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2778 SdHoareTripleChecker+Valid, 5617 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:16,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2778 Valid, 5617 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 684 Invalid, 7 Unknown, 0 Unchecked, 26.0s Time] [2021-11-23 03:57:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24059 states. [2021-11-23 03:57:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24059 to 24050. [2021-11-23 03:57:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24050 states, 16844 states have (on average 1.4386131560199478) internal successors, (24232), 17104 states have internal predecessors, (24232), 5889 states have call successors, (5889), 1325 states have call predecessors, (5889), 1316 states have return successors, (6128), 5795 states have call predecessors, (6128), 5880 states have call successors, (6128) [2021-11-23 03:57:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24050 states to 24050 states and 36249 transitions. [2021-11-23 03:57:17,760 INFO L78 Accepts]: Start accepts. Automaton has 24050 states and 36249 transitions. Word has length 793 [2021-11-23 03:57:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:17,762 INFO L470 AbstractCegarLoop]: Abstraction has 24050 states and 36249 transitions. [2021-11-23 03:57:17,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:57:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 24050 states and 36249 transitions. [2021-11-23 03:57:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2021-11-23 03:57:17,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:17,772 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:57:17,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:57:17,772 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash -713457255, now seen corresponding path program 1 times [2021-11-23 03:57:17,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578262255] [2021-11-23 03:57:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:17,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2021-11-23 03:57:18,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578262255] [2021-11-23 03:57:18,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578262255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:18,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:18,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:57:18,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745906493] [2021-11-23 03:57:18,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:18,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:57:18,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:57:18,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:18,515 INFO L87 Difference]: Start difference. First operand 24050 states and 36249 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:57:20,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:22,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:26,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:29,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:57:32,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:34,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:37,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:40,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:43,022 INFO L93 Difference]: Finished difference Result 39295 states and 59265 transitions. [2021-11-23 03:57:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:57:43,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 794 [2021-11-23 03:57:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:43,310 INFO L225 Difference]: With dead ends: 39295 [2021-11-23 03:57:43,311 INFO L226 Difference]: Without dead ends: 39268 [2021-11-23 03:57:43,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:43,349 INFO L933 BasicCegarLoop]: 3082 mSDtfsCounter, 2640 mSDsluCounter, 2740 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2654 SdHoareTripleChecker+Valid, 5492 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:43,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2654 Valid, 5492 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 678 Invalid, 7 Unknown, 0 Unchecked, 23.5s Time] [2021-11-23 03:57:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39268 states. [2021-11-23 03:57:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39268 to 39251. [2021-11-23 03:57:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39251 states, 27681 states have (on average 1.4426140674108594) internal successors, (39933), 28111 states have internal predecessors, (39933), 9383 states have call successors, (9383), 2224 states have call predecessors, (9383), 2186 states have return successors, (9870), 9182 states have call predecessors, (9870), 9374 states have call successors, (9870) [2021-11-23 03:57:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39251 states to 39251 states and 59186 transitions. [2021-11-23 03:57:45,986 INFO L78 Accepts]: Start accepts. Automaton has 39251 states and 59186 transitions. Word has length 794 [2021-11-23 03:57:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:45,987 INFO L470 AbstractCegarLoop]: Abstraction has 39251 states and 59186 transitions. [2021-11-23 03:57:45,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-23 03:57:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 39251 states and 59186 transitions. [2021-11-23 03:57:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2021-11-23 03:57:45,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:46,000 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:57:46,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:57:46,001 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1345807827, now seen corresponding path program 1 times [2021-11-23 03:57:46,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:46,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418714177] [2021-11-23 03:57:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:46,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16734 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16728 trivial. 0 not checked. [2021-11-23 03:57:46,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:57:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418714177] [2021-11-23 03:57:46,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418714177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:46,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:46,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:57:46,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819336169] [2021-11-23 03:57:46,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:46,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:57:46,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:57:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:57:46,777 INFO L87 Difference]: Start difference. First operand 39251 states and 59186 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2021-11-23 03:57:48,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:50,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:55,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:57,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:57:58,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:00,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:02,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:04,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:07,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:09,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:12,313 INFO L93 Difference]: Finished difference Result 86531 states and 130365 transitions. [2021-11-23 03:58:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:58:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 819 [2021-11-23 03:58:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:12,638 INFO L225 Difference]: With dead ends: 86531 [2021-11-23 03:58:12,639 INFO L226 Difference]: Without dead ends: 47417 [2021-11-23 03:58:13,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:13,005 INFO L933 BasicCegarLoop]: 2902 mSDtfsCounter, 546 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 5569 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:13,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 5569 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 741 Invalid, 6 Unknown, 0 Unchecked, 24.1s Time] [2021-11-23 03:58:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47417 states. [2021-11-23 03:58:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47417 to 47345. [2021-11-23 03:58:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47345 states, 33707 states have (on average 1.448215504197941) internal successors, (48815), 34311 states have internal predecessors, (48815), 10981 states have call successors, (10981), 2700 states have call predecessors, (10981), 2656 states have return successors, (11468), 10748 states have call predecessors, (11468), 10972 states have call successors, (11468) [2021-11-23 03:58:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47345 states to 47345 states and 71264 transitions. [2021-11-23 03:58:16,007 INFO L78 Accepts]: Start accepts. Automaton has 47345 states and 71264 transitions. Word has length 819 [2021-11-23 03:58:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:16,008 INFO L470 AbstractCegarLoop]: Abstraction has 47345 states and 71264 transitions. [2021-11-23 03:58:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2021-11-23 03:58:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 47345 states and 71264 transitions. [2021-11-23 03:58:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2021-11-23 03:58:16,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:16,026 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:16,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:58:16,027 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash 430731551, now seen corresponding path program 1 times [2021-11-23 03:58:16,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:16,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423226068] [2021-11-23 03:58:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:16,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18501 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18498 trivial. 0 not checked. [2021-11-23 03:58:17,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423226068] [2021-11-23 03:58:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423226068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:17,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:17,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:58:17,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131547435] [2021-11-23 03:58:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:17,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:58:17,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:17,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:58:17,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:58:17,198 INFO L87 Difference]: Start difference. First operand 47345 states and 71264 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2021-11-23 03:58:19,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:22,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:24,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:29,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:30,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:32,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:34,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:36,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:39,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:58:41,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:44,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:46,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:48,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:58:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:51,988 INFO L93 Difference]: Finished difference Result 94847 states and 142777 transitions. [2021-11-23 03:58:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:58:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 871 [2021-11-23 03:58:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:52,299 INFO L225 Difference]: With dead ends: 94847 [2021-11-23 03:58:52,299 INFO L226 Difference]: Without dead ends: 47623 [2021-11-23 03:58:52,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:58:52,479 INFO L933 BasicCegarLoop]: 2691 mSDtfsCounter, 42 mSDsluCounter, 6060 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 9 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8068 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:52,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8068 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1033 Invalid, 8 Unknown, 0 Unchecked, 33.1s Time] [2021-11-23 03:58:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47623 states. [2021-11-23 03:58:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47623 to 46098. [2021-11-23 03:58:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46098 states, 33062 states have (on average 1.44803702135382) internal successors, (47875), 33528 states have internal predecessors, (47875), 10519 states have call successors, (10519), 2560 states have call predecessors, (10519), 2516 states have return successors, (11006), 10312 states have call predecessors, (11006), 10510 states have call successors, (11006) [2021-11-23 03:58:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46098 states to 46098 states and 69400 transitions. [2021-11-23 03:58:55,123 INFO L78 Accepts]: Start accepts. Automaton has 46098 states and 69400 transitions. Word has length 871 [2021-11-23 03:58:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:55,125 INFO L470 AbstractCegarLoop]: Abstraction has 46098 states and 69400 transitions. [2021-11-23 03:58:55,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 2 states have call successors, (82), 2 states have call predecessors, (82), 1 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2021-11-23 03:58:55,125 INFO L276 IsEmpty]: Start isEmpty. Operand 46098 states and 69400 transitions. [2021-11-23 03:58:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2021-11-23 03:58:55,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:55,143 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:58:55,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:58:55,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:58:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1275164964, now seen corresponding path program 1 times [2021-11-23 03:58:55,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:58:55,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472555668] [2021-11-23 03:58:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:55,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:58:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18501 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18498 trivial. 0 not checked. [2021-11-23 03:58:56,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:56,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472555668] [2021-11-23 03:58:56,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472555668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:58:56,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:58:56,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:58:56,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855610173] [2021-11-23 03:58:56,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:58:56,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:58:56,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:58:56,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:58:56,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:58:56,021 INFO L87 Difference]: Start difference. First operand 46098 states and 69400 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (81), 3 states have call predecessors, (81), 3 states have call successors, (81) [2021-11-23 03:58:58,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:04,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:59:06,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:09,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:11,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:59:13,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:59:16,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:18,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:22,841 INFO L93 Difference]: Finished difference Result 113929 states and 171645 transitions. [2021-11-23 03:59:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (81), 3 states have call predecessors, (81), 3 states have call successors, (81) Word has length 876 [2021-11-23 03:59:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:23,211 INFO L225 Difference]: With dead ends: 113929 [2021-11-23 03:59:23,211 INFO L226 Difference]: Without dead ends: 67968 [2021-11-23 03:59:23,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:23,550 INFO L933 BasicCegarLoop]: 3531 mSDtfsCounter, 2693 mSDsluCounter, 2974 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2693 SdHoareTripleChecker+Valid, 6171 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:23,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2693 Valid, 6171 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 746 Invalid, 7 Unknown, 0 Unchecked, 25.1s Time] [2021-11-23 03:59:23,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67968 states. [2021-11-23 03:59:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67968 to 67836. [2021-11-23 03:59:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67836 states, 48817 states have (on average 1.449536022287318) internal successors, (70762), 49487 states have internal predecessors, (70762), 15375 states have call successors, (15375), 3706 states have call predecessors, (15375), 3643 states have return successors, (16052), 15065 states have call predecessors, (16052), 15366 states have call successors, (16052) [2021-11-23 03:59:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67836 states to 67836 states and 102189 transitions. [2021-11-23 03:59:26,558 INFO L78 Accepts]: Start accepts. Automaton has 67836 states and 102189 transitions. Word has length 876 [2021-11-23 03:59:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:26,560 INFO L470 AbstractCegarLoop]: Abstraction has 67836 states and 102189 transitions. [2021-11-23 03:59:26,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 3 states have call successors, (83), 2 states have call predecessors, (83), 1 states have return successors, (81), 3 states have call predecessors, (81), 3 states have call successors, (81) [2021-11-23 03:59:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 67836 states and 102189 transitions. [2021-11-23 03:59:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2021-11-23 03:59:26,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:26,579 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:59:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:59:26,579 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -307996471, now seen corresponding path program 1 times [2021-11-23 03:59:26,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:26,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655105764] [2021-11-23 03:59:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:26,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18513 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18507 trivial. 0 not checked. [2021-11-23 03:59:27,433 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:27,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655105764] [2021-11-23 03:59:27,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655105764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:27,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:27,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:59:27,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108282732] [2021-11-23 03:59:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:27,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:27,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:27,437 INFO L87 Difference]: Start difference. First operand 67836 states and 102189 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2021-11-23 03:59:29,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:35,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:59:38,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:41,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:59:44,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:59:46,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:48,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:59:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:53,993 INFO L93 Difference]: Finished difference Result 175597 states and 263349 transitions. [2021-11-23 03:59:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:59:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) Word has length 877 [2021-11-23 03:59:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:54,512 INFO L225 Difference]: With dead ends: 175597 [2021-11-23 03:59:54,513 INFO L226 Difference]: Without dead ends: 107898 [2021-11-23 03:59:54,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:54,885 INFO L933 BasicCegarLoop]: 3266 mSDtfsCounter, 2037 mSDsluCounter, 2842 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 16 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 5781 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:54,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2037 Valid, 5781 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 737 Invalid, 5 Unknown, 0 Unchecked, 23.9s Time] [2021-11-23 03:59:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107898 states. [2021-11-23 03:59:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107898 to 106006. [2021-11-23 03:59:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106006 states, 76267 states have (on average 1.4427996381134698) internal successors, (110038), 77187 states have internal predecessors, (110038), 23572 states have call successors, (23572), 6262 states have call predecessors, (23572), 6166 states have return successors, (24633), 23131 states have call predecessors, (24633), 23563 states have call successors, (24633) [2021-11-23 03:59:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106006 states to 106006 states and 158243 transitions. [2021-11-23 03:59:58,964 INFO L78 Accepts]: Start accepts. Automaton has 106006 states and 158243 transitions. Word has length 877 [2021-11-23 03:59:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:58,965 INFO L470 AbstractCegarLoop]: Abstraction has 106006 states and 158243 transitions. [2021-11-23 03:59:58,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (81), 2 states have call predecessors, (81), 1 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2021-11-23 03:59:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 106006 states and 158243 transitions. [2021-11-23 03:59:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2021-11-23 03:59:58,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:58,981 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:59:58,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:59:58,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:59:58,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash -762468987, now seen corresponding path program 1 times [2021-11-23 03:59:58,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:59:58,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648354989] [2021-11-23 03:59:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:58,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:59:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18509 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18509 trivial. 0 not checked. [2021-11-23 03:59:59,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:59:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648354989] [2021-11-23 03:59:59,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648354989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:59,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:59,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:59:59,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974205749] [2021-11-23 03:59:59,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:59,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:59:59,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:59:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:59:59,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:59:59,612 INFO L87 Difference]: Start difference. First operand 106006 states and 158243 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-23 04:00:01,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:06,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:09,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:00:12,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:15,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:00:16,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:18,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:20,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:22,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:27,423 INFO L93 Difference]: Finished difference Result 212119 states and 316738 transitions. [2021-11-23 04:00:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:00:27,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 884 [2021-11-23 04:00:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:28,412 INFO L225 Difference]: With dead ends: 212119 [2021-11-23 04:00:28,413 INFO L226 Difference]: Without dead ends: 106258 [2021-11-23 04:00:28,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:00:28,765 INFO L933 BasicCegarLoop]: 2693 mSDtfsCounter, 6 mSDsluCounter, 3032 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5385 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:28,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5385 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 686 Invalid, 5 Unknown, 0 Unchecked, 24.5s Time] [2021-11-23 04:00:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106258 states. [2021-11-23 04:00:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106258 to 106048. [2021-11-23 04:00:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106048 states, 76309 states have (on average 1.4425559239408197) internal successors, (110080), 77229 states have internal predecessors, (110080), 23572 states have call successors, (23572), 6262 states have call predecessors, (23572), 6166 states have return successors, (24633), 23131 states have call predecessors, (24633), 23563 states have call successors, (24633) [2021-11-23 04:00:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106048 states to 106048 states and 158285 transitions. [2021-11-23 04:00:33,397 INFO L78 Accepts]: Start accepts. Automaton has 106048 states and 158285 transitions. Word has length 884 [2021-11-23 04:00:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:33,398 INFO L470 AbstractCegarLoop]: Abstraction has 106048 states and 158285 transitions. [2021-11-23 04:00:33,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-23 04:00:33,399 INFO L276 IsEmpty]: Start isEmpty. Operand 106048 states and 158285 transitions. [2021-11-23 04:00:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2021-11-23 04:00:33,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:33,415 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:00:33,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 04:00:33,416 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:00:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:33,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1615301789, now seen corresponding path program 1 times [2021-11-23 04:00:33,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:00:33,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621540096] [2021-11-23 04:00:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:33,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:00:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18505 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18505 trivial. 0 not checked. [2021-11-23 04:00:34,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:00:34,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621540096] [2021-11-23 04:00:34,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621540096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:00:34,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:00:34,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 04:00:34,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040817671] [2021-11-23 04:00:34,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:00:34,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 04:00:34,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:00:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 04:00:34,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:00:34,218 INFO L87 Difference]: Start difference. First operand 106048 states and 158285 transitions. Second operand has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 3 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (79), 3 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-23 04:00:36,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:46,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:47,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:49,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:51,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:00:54,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:00:57,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:02,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:01:04,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:06,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:07,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:08,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:10,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:12,914 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:19,455 INFO L93 Difference]: Finished difference Result 131568 states and 195104 transitions. [2021-11-23 04:01:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 04:01:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 3 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (79), 3 states have call predecessors, (79), 2 states have call successors, (79) Word has length 885 [2021-11-23 04:01:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:20,183 INFO L225 Difference]: With dead ends: 131568 [2021-11-23 04:01:20,183 INFO L226 Difference]: Without dead ends: 131565 [2021-11-23 04:01:20,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 04:01:20,443 INFO L933 BasicCegarLoop]: 3185 mSDtfsCounter, 1017 mSDsluCounter, 11418 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 12 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 13343 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.8s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:20,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 13343 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1736 Invalid, 9 Unknown, 0 Unchecked, 42.8s Time] [2021-11-23 04:01:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131565 states. [2021-11-23 04:01:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131565 to 131517. [2021-11-23 04:01:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131517 states, 93597 states have (on average 1.4347895765889933) internal successors, (134292), 94724 states have internal predecessors, (134292), 29620 states have call successors, (29620), 8415 states have call predecessors, (29620), 8299 states have return successors, (31101), 29043 states have call predecessors, (31101), 29611 states have call successors, (31101) [2021-11-23 04:01:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131517 states to 131517 states and 195013 transitions. [2021-11-23 04:01:25,255 INFO L78 Accepts]: Start accepts. Automaton has 131517 states and 195013 transitions. Word has length 885 [2021-11-23 04:01:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:01:25,256 INFO L470 AbstractCegarLoop]: Abstraction has 131517 states and 195013 transitions. [2021-11-23 04:01:25,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 3 states have call successors, (82), 3 states have call predecessors, (82), 2 states have return successors, (79), 3 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-23 04:01:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 131517 states and 195013 transitions. [2021-11-23 04:01:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2021-11-23 04:01:25,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:01:25,276 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:01:25,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 04:01:25,277 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:01:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:01:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1496920316, now seen corresponding path program 1 times [2021-11-23 04:01:25,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:01:25,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785601854] [2021-11-23 04:01:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:25,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:01:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18510 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18509 trivial. 0 not checked. [2021-11-23 04:01:26,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:01:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785601854] [2021-11-23 04:01:26,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785601854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 04:01:26,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 04:01:26,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 04:01:26,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132822184] [2021-11-23 04:01:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 04:01:26,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 04:01:26,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 04:01:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 04:01:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:26,427 INFO L87 Difference]: Start difference. First operand 131517 states and 195013 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-23 04:01:28,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:30,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:33,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:36,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:01:37,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:01:39,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:41,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:44,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 04:01:46,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:48,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:50,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 04:01:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:55,717 INFO L93 Difference]: Finished difference Result 263099 states and 390194 transitions. [2021-11-23 04:01:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 04:01:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 886 [2021-11-23 04:01:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:56,432 INFO L225 Difference]: With dead ends: 263099 [2021-11-23 04:01:56,432 INFO L226 Difference]: Without dead ends: 131727 [2021-11-23 04:01:57,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 04:01:57,112 INFO L933 BasicCegarLoop]: 2693 mSDtfsCounter, 4 mSDsluCounter, 3028 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5384 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:57,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5384 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 684 Invalid, 6 Unknown, 0 Unchecked, 25.0s Time] [2021-11-23 04:01:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131727 states. [2021-11-23 04:02:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131727 to 131559. [2021-11-23 04:02:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131559 states, 93639 states have (on average 1.4345945599589915) internal successors, (134334), 94766 states have internal predecessors, (134334), 29620 states have call successors, (29620), 8415 states have call predecessors, (29620), 8299 states have return successors, (31101), 29043 states have call predecessors, (31101), 29611 states have call successors, (31101) [2021-11-23 04:02:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131559 states to 131559 states and 195055 transitions. [2021-11-23 04:02:02,533 INFO L78 Accepts]: Start accepts. Automaton has 131559 states and 195055 transitions. Word has length 886 [2021-11-23 04:02:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:02:02,537 INFO L470 AbstractCegarLoop]: Abstraction has 131559 states and 195055 transitions. [2021-11-23 04:02:02,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 2 states have call successors, (83), 2 states have call predecessors, (83), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2021-11-23 04:02:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 131559 states and 195055 transitions. [2021-11-23 04:02:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2021-11-23 04:02:02,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:02:02,557 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 04:02:02,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 04:02:02,558 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 04:02:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:02:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1556017204, now seen corresponding path program 1 times [2021-11-23 04:02:02,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 04:02:02,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730161876] [2021-11-23 04:02:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:02,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 04:02:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18511 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18509 trivial. 0 not checked. [2021-11-23 04:02:03,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 04:02:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730161876] [2021-11-23 04:02:03,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730161876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 04:02:03,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910621451] [2021-11-23 04:02:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:03,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:02:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:02:03,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:02:03,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d417fcc-0cb4-48f3-8d65-b607f599b65d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 04:02:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 9157 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 04:02:06,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:02:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18511 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18509 trivial. 0 not checked. [2021-11-23 04:02:07,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:02:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18511 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18509 trivial. 0 not checked. [2021-11-23 04:02:09,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910621451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:02:09,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614707387] [2021-11-23 04:02:09,838 INFO L159 IcfgInterpreter]: Started Sifa with 229 locations of interest [2021-11-23 04:02:09,839 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 04:02:09,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 04:02:09,852 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 04:02:09,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 04:02:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:29,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:31,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:36,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:41,282 INFO L244 Elim1Store]: Index analysis took 15018 ms