./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--memstick--core--ms_block.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:40:28,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:40:28,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:40:28,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:40:28,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:40:28,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:40:28,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:40:28,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:40:28,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:40:28,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:40:28,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:40:28,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:40:28,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:40:28,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:40:28,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:40:28,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:40:28,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:40:28,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:40:28,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:40:28,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:40:28,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:40:28,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:40:28,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:40:28,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:40:28,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:40:28,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:40:28,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:40:28,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:40:28,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:40:28,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:40:28,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:40:28,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:40:28,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:40:28,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:40:28,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:40:28,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:40:28,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:40:28,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:40:28,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:40:28,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:40:28,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:40:28,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:40:28,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:40:28,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:40:28,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:40:28,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:40:28,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:40:28,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:40:28,361 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:40:28,361 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:40:28,362 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:40:28,362 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:40:28,363 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:40:28,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:40:28,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:40:28,365 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:40:28,365 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:40:28,365 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:40:28,366 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:40:28,366 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:40:28,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:40:28,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:40:28,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:40:28,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:40:28,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:40:28,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:40:28,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:40:28,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:40:28,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:40:28,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:40:28,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:40:28,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:40:28,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:40:28,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:40:28,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:40:28,373 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:40:28,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:40:28,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:40:28,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:40:28,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:40:28,375 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_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1264b42ba0b5dcb83ee2e2b35dfcd5adbd8a3fb1fa3fff4328b672883ffa55c1 [2021-11-21 00:40:28,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:40:28,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:40:28,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:40:28,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:40:28,834 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:40:28,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-21 00:40:28,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/data/35f5afc7e/e375f82a843147898448dff39d9c572d/FLAG744074013 [2021-11-21 00:40:30,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:40:30,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-21 00:40:30,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/data/35f5afc7e/e375f82a843147898448dff39d9c572d/FLAG744074013 [2021-11-21 00:40:30,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/data/35f5afc7e/e375f82a843147898448dff39d9c572d [2021-11-21 00:40:30,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:40:30,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:40:30,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:40:30,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:40:30,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:40:30,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:40:30" (1/1) ... [2021-11-21 00:40:30,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68eb659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:30, skipping insertion in model container [2021-11-21 00:40:30,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:40:30" (1/1) ... [2021-11-21 00:40:30,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:40:30,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:40:33,179 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_3cec2f36-6ca3-49d6-a35d-15098248412b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-21 00:40:33,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:40:33,475 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:40:34,034 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_3cec2f36-6ca3-49d6-a35d-15098248412b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i[237227,237240] [2021-11-21 00:40:34,058 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:40:34,229 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:40:34,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34 WrapperNode [2021-11-21 00:40:34,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:40:34,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:40:34,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:40:34,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:40:34,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,627 INFO L137 Inliner]: procedures = 306, calls = 1743, calls flagged for inlining = 109, calls inlined = 100, statements flattened = 3797 [2021-11-21 00:40:34,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:40:34,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:40:34,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:40:34,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:40:34,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:40:34,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:40:34,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:40:34,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:40:34,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (1/1) ... [2021-11-21 00:40:34,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:40:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:40:34,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:40:35,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:40:35,101 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-21 00:40:35,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-21 00:40:35,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_memstick_host [2021-11-21 00:40:35,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_memstick_host [2021-11-21 00:40:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-21 00:40:35,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2021-11-21 00:40:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:40:35,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:40:35,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:40:35,103 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:40:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure msb_stop [2021-11-21 00:40:35,103 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_stop [2021-11-21 00:40:35,103 INFO L130 BoogieDeclarations]: Found specification of procedure msb_get_zone_from_pba [2021-11-21 00:40:35,103 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_get_zone_from_pba [2021-11-21 00:40:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-21 00:40:35,104 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-21 00:40:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:40:35,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:40:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure blk_fetch_request [2021-11-21 00:40:35,105 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_fetch_request [2021-11-21 00:40:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-21 00:40:35,105 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-21 00:40:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-21 00:40:35,105 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-21 00:40:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 00:40:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 00:40:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 00:40:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 00:40:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure msb_switch_to_parallel [2021-11-21 00:40:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_switch_to_parallel [2021-11-21 00:40:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:40:35,107 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:40:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:40:35,107 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:40:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure msb_validate_used_block_bitmap [2021-11-21 00:40:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_validate_used_block_bitmap [2021-11-21 00:40:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-21 00:40:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-21 00:40:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure msb_verify_block [2021-11-21 00:40:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_verify_block [2021-11-21 00:40:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 00:40:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 00:40:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_2 [2021-11-21 00:40:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_2 [2021-11-21 00:40:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_msb_disk_lock [2021-11-21 00:40:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_msb_disk_lock [2021-11-21 00:40:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:40:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_write [2021-11-21 00:40:35,110 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_write [2021-11-21 00:40:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 00:40:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-21 00:40:35,111 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-21 00:40:35,111 INFO L130 BoogieDeclarations]: Found specification of procedure memstick_set_drvdata [2021-11-21 00:40:35,111 INFO L138 BoogieDeclarations]: Found implementation of procedure memstick_set_drvdata [2021-11-21 00:40:35,111 INFO L130 BoogieDeclarations]: Found specification of procedure __blk_end_request [2021-11-21 00:40:35,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __blk_end_request [2021-11-21 00:40:35,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:40:35,112 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-21 00:40:35,112 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-21 00:40:35,112 INFO L130 BoogieDeclarations]: Found specification of procedure msb_invalidate_reg_window [2021-11-21 00:40:35,112 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_invalidate_reg_window [2021-11-21 00:40:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure msb_io_work [2021-11-21 00:40:35,113 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_io_work [2021-11-21 00:40:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 00:40:35,113 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 00:40:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_table [2021-11-21 00:40:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_table [2021-11-21 00:40:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:40:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure msb_erase_block [2021-11-21 00:40:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_erase_block [2021-11-21 00:40:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:40:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure memstick_get_drvdata [2021-11-21 00:40:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure memstick_get_drvdata [2021-11-21 00:40:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure msb_data_clear [2021-11-21 00:40:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_data_clear [2021-11-21 00:40:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-21 00:40:35,116 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-21 00:40:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-21 00:40:35,116 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-21 00:40:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-21 00:40:35,116 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-21 00:40:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-21 00:40:35,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-21 00:40:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-21 00:40:35,117 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-21 00:40:35,117 INFO L130 BoogieDeclarations]: Found specification of procedure msb_read_bad_block_table [2021-11-21 00:40:35,117 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_read_bad_block_table [2021-11-21 00:40:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure msb_update_block [2021-11-21 00:40:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_update_block [2021-11-21 00:40:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_flush [2021-11-21 00:40:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_flush [2021-11-21 00:40:35,118 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_next [2021-11-21 00:40:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_next [2021-11-21 00:40:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-21 00:40:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-21 00:40:35,119 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_start [2021-11-21 00:40:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_start [2021-11-21 00:40:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure msb_run_state_machine [2021-11-21 00:40:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_run_state_machine [2021-11-21 00:40:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure msb_sg_copy [2021-11-21 00:40:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_sg_copy [2021-11-21 00:40:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-21 00:40:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-21 00:40:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-21 00:40:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-21 00:40:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure find_next_zero_bit [2021-11-21 00:40:35,121 INFO L138 BoogieDeclarations]: Found implementation of procedure find_next_zero_bit [2021-11-21 00:40:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_memstick_host [2021-11-21 00:40:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_memstick_host [2021-11-21 00:40:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:40:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-21 00:40:35,122 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-21 00:40:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure msb_get_zone_from_lba [2021-11-21 00:40:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_get_zone_from_lba [2021-11-21 00:40:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure msb_reset [2021-11-21 00:40:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_reset [2021-11-21 00:40:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_2 [2021-11-21 00:40:35,123 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_2 [2021-11-21 00:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure blk_start_queue [2021-11-21 00:40:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_start_queue [2021-11-21 00:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 00:40:35,124 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 00:40:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2021-11-21 00:40:35,125 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2021-11-21 00:40:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure msb_bd_getgeo [2021-11-21 00:40:35,125 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_bd_getgeo [2021-11-21 00:40:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:40:35,125 INFO L130 BoogieDeclarations]: Found specification of procedure msb_remove [2021-11-21 00:40:35,126 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_remove [2021-11-21 00:40:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:40:35,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:40:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure sg_next [2021-11-21 00:40:35,126 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_next [2021-11-21 00:40:35,126 INFO L130 BoogieDeclarations]: Found specification of procedure msb_mark_bad [2021-11-21 00:40:35,127 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_mark_bad [2021-11-21 00:40:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 00:40:35,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 00:40:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:40:35,127 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_2 [2021-11-21 00:40:35,127 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_2 [2021-11-21 00:40:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 00:40:35,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 00:40:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:40:35,128 INFO L130 BoogieDeclarations]: Found specification of procedure sg_nents [2021-11-21 00:40:35,128 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_nents [2021-11-21 00:40:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:40:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure msb_read_page [2021-11-21 00:40:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_read_page [2021-11-21 00:40:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure __set_bit [2021-11-21 00:40:35,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __set_bit [2021-11-21 00:40:35,129 INFO L130 BoogieDeclarations]: Found specification of procedure sg_miter_stop [2021-11-21 00:40:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_miter_stop [2021-11-21 00:40:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure msb_set_overwrite_flag [2021-11-21 00:40:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_set_overwrite_flag [2021-11-21 00:40:35,130 INFO L130 BoogieDeclarations]: Found specification of procedure blk_rq_bytes [2021-11-21 00:40:35,130 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_rq_bytes [2021-11-21 00:40:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-21 00:40:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-21 00:40:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure msb_disk_release [2021-11-21 00:40:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_disk_release [2021-11-21 00:40:35,131 INFO L130 BoogieDeclarations]: Found specification of procedure msb_mark_block_used [2021-11-21 00:40:35,131 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_mark_block_used [2021-11-21 00:40:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure msb_cache_discard [2021-11-21 00:40:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_cache_discard [2021-11-21 00:40:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-21 00:40:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-21 00:40:35,132 INFO L130 BoogieDeclarations]: Found specification of procedure msb_start [2021-11-21 00:40:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_start [2021-11-21 00:40:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-21 00:40:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-21 00:40:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-21 00:40:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-21 00:40:35,133 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-21 00:40:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-21 00:40:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure msb_init_card [2021-11-21 00:40:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure msb_init_card [2021-11-21 00:40:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2021-11-21 00:40:35,134 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2021-11-21 00:40:35,134 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-21 00:40:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-21 00:40:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:40:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_one [2021-11-21 00:40:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_one [2021-11-21 00:40:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-21 00:40:35,135 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-21 00:40:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_msb_disk_lock [2021-11-21 00:40:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_msb_disk_lock [2021-11-21 00:40:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:40:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:40:36,003 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:40:36,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:40:36,332 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:40:39,568 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:40:40,945 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:40:40,945 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:40:40,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:40:40 BoogieIcfgContainer [2021-11-21 00:40:40,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:40:40,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:40:40,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:40:40,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:40:40,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:40:30" (1/3) ... [2021-11-21 00:40:40,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d04302f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:40:40, skipping insertion in model container [2021-11-21 00:40:40,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:40:34" (2/3) ... [2021-11-21 00:40:40,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d04302f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:40:40, skipping insertion in model container [2021-11-21 00:40:40,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:40:40" (3/3) ... [2021-11-21 00:40:40,967 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--memstick--core--ms_block.ko-entry_point.cil.out.i [2021-11-21 00:40:40,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:40:40,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:40:41,063 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:40:41,073 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 [2021-11-21 00:40:41,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:40:41,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 1151 states, 719 states have (on average 1.3532684283727399) internal successors, (973), 763 states have internal predecessors, (973), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (337), 331 states have call predecessors, (337), 337 states have call successors, (337) [2021-11-21 00:40:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:40:41,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:40:41,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:40:41,152 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:40:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:40:41,159 INFO L85 PathProgramCache]: Analyzing trace with hash -896570951, now seen corresponding path program 1 times [2021-11-21 00:40:41,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:40:41,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377420658] [2021-11-21 00:40:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:40:41,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:40:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:40:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:40:41,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:40:41,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377420658] [2021-11-21 00:40:41,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377420658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:40:41,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:40:41,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:40:41,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843327390] [2021-11-21 00:40:41,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:40:41,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:40:41,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:40:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:40:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:40:42,004 INFO L87 Difference]: Start difference. First operand has 1151 states, 719 states have (on average 1.3532684283727399) internal successors, (973), 763 states have internal predecessors, (973), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (337), 331 states have call predecessors, (337), 337 states have call successors, (337) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-21 00:40:46,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:40:48,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:40:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:40:48,479 INFO L93 Difference]: Finished difference Result 3383 states and 4890 transitions. [2021-11-21 00:40:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:40:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 64 [2021-11-21 00:40:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:40:48,553 INFO L225 Difference]: With dead ends: 3383 [2021-11-21 00:40:48,554 INFO L226 Difference]: Without dead ends: 2206 [2021-11-21 00:40:48,572 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 [2021-11-21 00:40:48,577 INFO L933 BasicCegarLoop]: 1765 mSDtfsCounter, 1575 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 3174 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:40:48,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1577 Valid, 3174 Invalid, 430 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-21 00:40:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-11-21 00:40:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 2187. [2021-11-21 00:40:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 1370 states have (on average 1.3313868613138686) internal successors, (1824), 1435 states have internal predecessors, (1824), 646 states have call successors, (646), 171 states have call predecessors, (646), 170 states have return successors, (639), 623 states have call predecessors, (639), 637 states have call successors, (639) [2021-11-21 00:40:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3109 transitions. [2021-11-21 00:40:49,144 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3109 transitions. Word has length 64 [2021-11-21 00:40:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:40:49,145 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3109 transitions. [2021-11-21 00:40:49,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-21 00:40:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3109 transitions. [2021-11-21 00:40:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:40:49,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:40:49,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:40:49,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:40:49,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:40:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:40:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash 232886649, now seen corresponding path program 1 times [2021-11-21 00:40:49,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:40:49,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958899646] [2021-11-21 00:40:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:40:49,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:40:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:40:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:40:49,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:40:49,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958899646] [2021-11-21 00:40:49,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958899646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:40:49,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:40:49,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:40:49,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263309446] [2021-11-21 00:40:49,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:40:49,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:40:49,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:40:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:40:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:40:49,537 INFO L87 Difference]: Start difference. First operand 2187 states and 3109 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:40:54,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:40:56,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:40:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:40:56,714 INFO L93 Difference]: Finished difference Result 6469 states and 9202 transitions. [2021-11-21 00:40:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:40:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2021-11-21 00:40:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:40:56,773 INFO L225 Difference]: With dead ends: 6469 [2021-11-21 00:40:56,773 INFO L226 Difference]: Without dead ends: 4297 [2021-11-21 00:40:56,794 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 [2021-11-21 00:40:56,795 INFO L933 BasicCegarLoop]: 1756 mSDtfsCounter, 1520 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 3139 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:40:56,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 3139 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-11-21 00:40:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-11-21 00:40:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 4288. [2021-11-21 00:40:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 2693 states have (on average 1.3301151132565912) internal successors, (3582), 2811 states have internal predecessors, (3582), 1260 states have call successors, (1260), 335 states have call predecessors, (1260), 334 states have return successors, (1257), 1226 states have call predecessors, (1257), 1251 states have call successors, (1257) [2021-11-21 00:40:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 6099 transitions. [2021-11-21 00:40:57,295 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 6099 transitions. Word has length 67 [2021-11-21 00:40:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:40:57,296 INFO L470 AbstractCegarLoop]: Abstraction has 4288 states and 6099 transitions. [2021-11-21 00:40:57,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 00:40:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 6099 transitions. [2021-11-21 00:40:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:40:57,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:40:57,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:40:57,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:40:57,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:40:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:40:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1944821062, now seen corresponding path program 1 times [2021-11-21 00:40:57,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:40:57,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376278489] [2021-11-21 00:40:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:40:57,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:40:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:40:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:40:57,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:40:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376278489] [2021-11-21 00:40:57,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376278489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:40:57,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:40:57,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:40:57,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023674002] [2021-11-21 00:40:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:40:57,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:40:57,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:40:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:40:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:40:57,569 INFO L87 Difference]: Start difference. First operand 4288 states and 6099 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:40:58,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:01,850 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:04,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:05,158 INFO L93 Difference]: Finished difference Result 8543 states and 12151 transitions. [2021-11-21 00:41:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-11-21 00:41:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:05,266 INFO L225 Difference]: With dead ends: 8543 [2021-11-21 00:41:05,267 INFO L226 Difference]: Without dead ends: 8540 [2021-11-21 00:41:05,275 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 [2021-11-21 00:41:05,279 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 1557 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:05,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 3084 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-11-21 00:41:05,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2021-11-21 00:41:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8534. [2021-11-21 00:41:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 5366 states have (on average 1.3302273574357062) internal successors, (7138), 5593 states have internal predecessors, (7138), 2500 states have call successors, (2500), 668 states have call predecessors, (2500), 667 states have return successors, (2505), 2441 states have call predecessors, (2505), 2491 states have call successors, (2505) [2021-11-21 00:41:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 12143 transitions. [2021-11-21 00:41:06,003 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 12143 transitions. Word has length 68 [2021-11-21 00:41:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:06,005 INFO L470 AbstractCegarLoop]: Abstraction has 8534 states and 12143 transitions. [2021-11-21 00:41:06,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 12143 transitions. [2021-11-21 00:41:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 00:41:06,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:06,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:06,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:41:06,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:06,010 INFO L85 PathProgramCache]: Analyzing trace with hash 159416656, now seen corresponding path program 1 times [2021-11-21 00:41:06,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:06,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373313706] [2021-11-21 00:41:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:06,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:41:06,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:06,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373313706] [2021-11-21 00:41:06,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373313706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:06,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:06,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:06,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130322095] [2021-11-21 00:41:06,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:06,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:06,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:06,220 INFO L87 Difference]: Start difference. First operand 8534 states and 12143 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:09,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:11,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:12,971 INFO L93 Difference]: Finished difference Result 8544 states and 12152 transitions. [2021-11-21 00:41:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2021-11-21 00:41:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:13,074 INFO L225 Difference]: With dead ends: 8544 [2021-11-21 00:41:13,074 INFO L226 Difference]: Without dead ends: 8541 [2021-11-21 00:41:13,080 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 [2021-11-21 00:41:13,084 INFO L933 BasicCegarLoop]: 1715 mSDtfsCounter, 1554 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 3087 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:13,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 3087 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-21 00:41:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2021-11-21 00:41:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 8535. [2021-11-21 00:41:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8535 states, 5367 states have (on average 1.330165828209428) internal successors, (7139), 5594 states have internal predecessors, (7139), 2500 states have call successors, (2500), 668 states have call predecessors, (2500), 667 states have return successors, (2505), 2441 states have call predecessors, (2505), 2491 states have call successors, (2505) [2021-11-21 00:41:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8535 states to 8535 states and 12144 transitions. [2021-11-21 00:41:13,915 INFO L78 Accepts]: Start accepts. Automaton has 8535 states and 12144 transitions. Word has length 69 [2021-11-21 00:41:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:13,918 INFO L470 AbstractCegarLoop]: Abstraction has 8535 states and 12144 transitions. [2021-11-21 00:41:13,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 8535 states and 12144 transitions. [2021-11-21 00:41:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:41:13,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:13,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:41:13,923 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 646459785, now seen corresponding path program 1 times [2021-11-21 00:41:13,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793603833] [2021-11-21 00:41:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:13,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:41:14,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:14,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793603833] [2021-11-21 00:41:14,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793603833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:14,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:14,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689463439] [2021-11-21 00:41:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:14,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:14,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:14,122 INFO L87 Difference]: Start difference. First operand 8535 states and 12144 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:17,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:20,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:20,604 INFO L93 Difference]: Finished difference Result 14405 states and 20337 transitions. [2021-11-21 00:41:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2021-11-21 00:41:20,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:20,716 INFO L225 Difference]: With dead ends: 14405 [2021-11-21 00:41:20,716 INFO L226 Difference]: Without dead ends: 14401 [2021-11-21 00:41:20,724 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 [2021-11-21 00:41:20,725 INFO L933 BasicCegarLoop]: 1924 mSDtfsCounter, 1478 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 3293 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:20,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 3293 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-21 00:41:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14401 states. [2021-11-21 00:41:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14401 to 14395. [2021-11-21 00:41:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14395 states, 9062 states have (on average 1.3263076583535642) internal successors, (12019), 9426 states have internal predecessors, (12019), 4140 states have call successors, (4140), 1197 states have call predecessors, (4140), 1192 states have return successors, (4161), 4040 states have call predecessors, (4161), 4131 states have call successors, (4161) [2021-11-21 00:41:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14395 states to 14395 states and 20320 transitions. [2021-11-21 00:41:21,604 INFO L78 Accepts]: Start accepts. Automaton has 14395 states and 20320 transitions. Word has length 70 [2021-11-21 00:41:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:21,605 INFO L470 AbstractCegarLoop]: Abstraction has 14395 states and 20320 transitions. [2021-11-21 00:41:21,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand 14395 states and 20320 transitions. [2021-11-21 00:41:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 00:41:21,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:21,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:21,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:41:21,607 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:21,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1435067533, now seen corresponding path program 1 times [2021-11-21 00:41:21,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:21,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187042364] [2021-11-21 00:41:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:21,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:41:21,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:21,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187042364] [2021-11-21 00:41:21,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187042364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:21,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:21,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:21,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165533002] [2021-11-21 00:41:21,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:21,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:21,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:21,777 INFO L87 Difference]: Start difference. First operand 14395 states and 20320 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:24,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:27,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:27,921 INFO L93 Difference]: Finished difference Result 22225 states and 31443 transitions. [2021-11-21 00:41:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-21 00:41:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:28,072 INFO L225 Difference]: With dead ends: 22225 [2021-11-21 00:41:28,072 INFO L226 Difference]: Without dead ends: 22221 [2021-11-21 00:41:28,090 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 [2021-11-21 00:41:28,092 INFO L933 BasicCegarLoop]: 1696 mSDtfsCounter, 1505 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:28,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 3032 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-21 00:41:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22221 states. [2021-11-21 00:41:29,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22221 to 22214. [2021-11-21 00:41:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22214 states, 14063 states have (on average 1.3300149328023891) internal successors, (18704), 14653 states have internal predecessors, (18704), 6340 states have call successors, (6340), 1839 states have call predecessors, (6340), 1810 states have return successors, (6377), 6142 states have call predecessors, (6377), 6331 states have call successors, (6377) [2021-11-21 00:41:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22214 states to 22214 states and 31421 transitions. [2021-11-21 00:41:29,302 INFO L78 Accepts]: Start accepts. Automaton has 22214 states and 31421 transitions. Word has length 71 [2021-11-21 00:41:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:29,303 INFO L470 AbstractCegarLoop]: Abstraction has 22214 states and 31421 transitions. [2021-11-21 00:41:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 22214 states and 31421 transitions. [2021-11-21 00:41:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:41:29,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:29,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 00:41:29,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:41:29,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:29,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1537900084, now seen corresponding path program 1 times [2021-11-21 00:41:29,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826214795] [2021-11-21 00:41:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:29,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:41:29,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:29,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826214795] [2021-11-21 00:41:29,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826214795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:29,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:29,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:29,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198793455] [2021-11-21 00:41:29,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:29,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:29,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:29,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:29,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:29,468 INFO L87 Difference]: Start difference. First operand 22214 states and 31421 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:32,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:34,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:35,699 INFO L93 Difference]: Finished difference Result 22224 states and 31429 transitions. [2021-11-21 00:41:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 72 [2021-11-21 00:41:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:36,000 INFO L225 Difference]: With dead ends: 22224 [2021-11-21 00:41:36,001 INFO L226 Difference]: Without dead ends: 22211 [2021-11-21 00:41:36,013 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 [2021-11-21 00:41:36,029 INFO L933 BasicCegarLoop]: 1716 mSDtfsCounter, 1541 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:36,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 3097 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:41:36,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22211 states. [2021-11-21 00:41:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22211 to 22207. [2021-11-21 00:41:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22207 states, 14058 states have (on average 1.3297766396357946) internal successors, (18694), 14648 states have internal predecessors, (18694), 6339 states have call successors, (6339), 1838 states have call predecessors, (6339), 1809 states have return successors, (6376), 6141 states have call predecessors, (6376), 6330 states have call successors, (6376) [2021-11-21 00:41:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22207 states to 22207 states and 31409 transitions. [2021-11-21 00:41:37,457 INFO L78 Accepts]: Start accepts. Automaton has 22207 states and 31409 transitions. Word has length 72 [2021-11-21 00:41:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:37,458 INFO L470 AbstractCegarLoop]: Abstraction has 22207 states and 31409 transitions. [2021-11-21 00:41:37,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:41:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22207 states and 31409 transitions. [2021-11-21 00:41:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 00:41:37,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:37,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:37,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:41:37,469 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:37,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2106524904, now seen corresponding path program 1 times [2021-11-21 00:41:37,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:37,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942565124] [2021-11-21 00:41:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:37,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-21 00:41:37,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:37,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942565124] [2021-11-21 00:41:37,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942565124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:37,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:37,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:37,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779656316] [2021-11-21 00:41:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:37,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:37,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:37,603 INFO L87 Difference]: Start difference. First operand 22207 states and 31409 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-21 00:41:41,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:43,273 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:43,577 INFO L93 Difference]: Finished difference Result 22313 states and 31526 transitions. [2021-11-21 00:41:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 109 [2021-11-21 00:41:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:43,720 INFO L225 Difference]: With dead ends: 22313 [2021-11-21 00:41:43,720 INFO L226 Difference]: Without dead ends: 22310 [2021-11-21 00:41:43,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:43,739 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 57 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:43,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 2757 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-21 00:41:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22310 states. [2021-11-21 00:41:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22310 to 22310. [2021-11-21 00:41:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22310 states, 14110 states have (on average 1.3277108433734939) internal successors, (18734), 14699 states have internal predecessors, (18734), 6370 states have call successors, (6370), 1858 states have call predecessors, (6370), 1829 states have return successors, (6408), 6173 states have call predecessors, (6408), 6362 states have call successors, (6408) [2021-11-21 00:41:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22310 states to 22310 states and 31512 transitions. [2021-11-21 00:41:44,776 INFO L78 Accepts]: Start accepts. Automaton has 22310 states and 31512 transitions. Word has length 109 [2021-11-21 00:41:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:44,777 INFO L470 AbstractCegarLoop]: Abstraction has 22310 states and 31512 transitions. [2021-11-21 00:41:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-21 00:41:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 22310 states and 31512 transitions. [2021-11-21 00:41:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-21 00:41:44,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:44,798 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:44,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:41:44,799 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1056481041, now seen corresponding path program 1 times [2021-11-21 00:41:44,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:44,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296532418] [2021-11-21 00:41:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:44,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 00:41:44,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296532418] [2021-11-21 00:41:44,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296532418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:44,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:44,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:44,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524665577] [2021-11-21 00:41:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:44,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:44,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:44,918 INFO L87 Difference]: Start difference. First operand 22310 states and 31512 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:41:48,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:41:51,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:41:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:41:51,834 INFO L93 Difference]: Finished difference Result 57016 states and 80113 transitions. [2021-11-21 00:41:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:41:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 125 [2021-11-21 00:41:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:41:51,997 INFO L225 Difference]: With dead ends: 57016 [2021-11-21 00:41:51,997 INFO L226 Difference]: Without dead ends: 34721 [2021-11-21 00:41:52,116 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 [2021-11-21 00:41:52,118 INFO L933 BasicCegarLoop]: 1644 mSDtfsCounter, 944 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 3009 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:41:52,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [944 Valid, 3009 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 440 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-21 00:41:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34721 states. [2021-11-21 00:41:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34721 to 34678. [2021-11-21 00:41:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34678 states, 22272 states have (on average 1.333423132183908) internal successors, (29698), 23131 states have internal predecessors, (29698), 9406 states have call successors, (9406), 3036 states have call predecessors, (9406), 2999 states have return successors, (9444), 9117 states have call predecessors, (9444), 9398 states have call successors, (9444) [2021-11-21 00:41:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34678 states to 34678 states and 48548 transitions. [2021-11-21 00:41:53,959 INFO L78 Accepts]: Start accepts. Automaton has 34678 states and 48548 transitions. Word has length 125 [2021-11-21 00:41:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:41:53,960 INFO L470 AbstractCegarLoop]: Abstraction has 34678 states and 48548 transitions. [2021-11-21 00:41:53,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:41:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 34678 states and 48548 transitions. [2021-11-21 00:41:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-21 00:41:53,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:41:54,000 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:41:54,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:41:54,000 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:41:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:41:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1908370995, now seen corresponding path program 1 times [2021-11-21 00:41:54,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:41:54,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329487334] [2021-11-21 00:41:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:41:54,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:41:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:41:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-21 00:41:54,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:41:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329487334] [2021-11-21 00:41:54,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329487334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:41:54,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:41:54,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:41:54,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984705324] [2021-11-21 00:41:54,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:41:54,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:41:54,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:41:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:41:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:41:54,154 INFO L87 Difference]: Start difference. First operand 34678 states and 48548 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-21 00:41:58,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:42:00,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:42:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:01,558 INFO L93 Difference]: Finished difference Result 83821 states and 117247 transitions. [2021-11-21 00:42:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 161 [2021-11-21 00:42:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:01,810 INFO L225 Difference]: With dead ends: 83821 [2021-11-21 00:42:01,810 INFO L226 Difference]: Without dead ends: 49166 [2021-11-21 00:42:02,033 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 [2021-11-21 00:42:02,033 INFO L933 BasicCegarLoop]: 2423 mSDtfsCounter, 1325 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 3746 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:02,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 3746 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 570 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-21 00:42:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49166 states. [2021-11-21 00:42:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49166 to 49121. [2021-11-21 00:42:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49121 states, 31828 states have (on average 1.3355536006032425) internal successors, (42508), 32994 states have internal predecessors, (42508), 12995 states have call successors, (12995), 4346 states have call predecessors, (12995), 4297 states have return successors, (13049), 12597 states have call predecessors, (13049), 12987 states have call successors, (13049) [2021-11-21 00:42:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49121 states to 49121 states and 68552 transitions. [2021-11-21 00:42:04,344 INFO L78 Accepts]: Start accepts. Automaton has 49121 states and 68552 transitions. Word has length 161 [2021-11-21 00:42:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:04,345 INFO L470 AbstractCegarLoop]: Abstraction has 49121 states and 68552 transitions. [2021-11-21 00:42:04,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-21 00:42:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49121 states and 68552 transitions. [2021-11-21 00:42:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-21 00:42:04,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:04,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:04,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:42:04,415 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1486403432, now seen corresponding path program 1 times [2021-11-21 00:42:04,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:04,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840433310] [2021-11-21 00:42:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:04,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-21 00:42:04,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:04,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840433310] [2021-11-21 00:42:04,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840433310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:04,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:04,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:42:04,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012273195] [2021-11-21 00:42:04,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:04,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:04,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:04,614 INFO L87 Difference]: Start difference. First operand 49121 states and 68552 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 00:42:07,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:42:10,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:42:12,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:42:13,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:13,860 INFO L93 Difference]: Finished difference Result 51086 states and 70919 transitions. [2021-11-21 00:42:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 185 [2021-11-21 00:42:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:14,091 INFO L225 Difference]: With dead ends: 51086 [2021-11-21 00:42:14,091 INFO L226 Difference]: Without dead ends: 51083 [2021-11-21 00:42:14,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:14,117 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 666 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 3049 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:14,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 3049 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2021-11-21 00:42:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51083 states. [2021-11-21 00:42:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51083 to 51083. [2021-11-21 00:42:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51083 states, 32998 states have (on average 1.3318382932298927) internal successors, (43948), 34197 states have internal predecessors, (43948), 13450 states have call successors, (13450), 4682 states have call predecessors, (13450), 4634 states have return successors, (13507), 13045 states have call predecessors, (13507), 13443 states have call successors, (13507) [2021-11-21 00:42:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51083 states to 51083 states and 70905 transitions. [2021-11-21 00:42:16,352 INFO L78 Accepts]: Start accepts. Automaton has 51083 states and 70905 transitions. Word has length 185 [2021-11-21 00:42:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:16,353 INFO L470 AbstractCegarLoop]: Abstraction has 51083 states and 70905 transitions. [2021-11-21 00:42:16,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-21 00:42:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 51083 states and 70905 transitions. [2021-11-21 00:42:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-21 00:42:16,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:16,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:16,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:42:16,446 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash -749769586, now seen corresponding path program 1 times [2021-11-21 00:42:16,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:16,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731235291] [2021-11-21 00:42:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:16,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:16,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:16,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658123996] [2021-11-21 00:42:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:16,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:16,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:16,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:16,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:42:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:42:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 00:42:18,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:42:18,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731235291] [2021-11-21 00:42:18,709 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658123996] [2021-11-21 00:42:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658123996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:18,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:18,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:42:18,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530054250] [2021-11-21 00:42:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:18,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:42:18,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:42:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:18,712 INFO L87 Difference]: Start difference. First operand 51083 states and 70905 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 00:42:21,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:42:24,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:42:27,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:42:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:28,653 INFO L93 Difference]: Finished difference Result 126016 states and 174797 transitions. [2021-11-21 00:42:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:42:28,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 225 [2021-11-21 00:42:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:28,997 INFO L225 Difference]: With dead ends: 126016 [2021-11-21 00:42:28,997 INFO L226 Difference]: Without dead ends: 74956 [2021-11-21 00:42:29,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:42:29,369 INFO L933 BasicCegarLoop]: 1712 mSDtfsCounter, 1441 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:29,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 3067 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 419 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2021-11-21 00:42:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74956 states. [2021-11-21 00:42:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74956 to 74907. [2021-11-21 00:42:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74907 states, 48395 states have (on average 1.330963942556049) internal successors, (64412), 50133 states have internal predecessors, (64412), 19650 states have call successors, (19650), 6925 states have call predecessors, (19650), 6861 states have return successors, (19739), 19081 states have call predecessors, (19739), 19643 states have call successors, (19739) [2021-11-21 00:42:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74907 states to 74907 states and 103801 transitions. [2021-11-21 00:42:32,004 INFO L78 Accepts]: Start accepts. Automaton has 74907 states and 103801 transitions. Word has length 225 [2021-11-21 00:42:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:32,006 INFO L470 AbstractCegarLoop]: Abstraction has 74907 states and 103801 transitions. [2021-11-21 00:42:32,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 00:42:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 74907 states and 103801 transitions. [2021-11-21 00:42:32,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-21 00:42:32,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:32,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:32,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:42:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:42:32,281 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1216897152, now seen corresponding path program 1 times [2021-11-21 00:42:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192182918] [2021-11-21 00:42:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:32,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:32,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365172381] [2021-11-21 00:42:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:32,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:32,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:32,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:42:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:33,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:42:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 00:42:33,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:42:33,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192182918] [2021-11-21 00:42:33,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:33,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365172381] [2021-11-21 00:42:33,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365172381] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:33,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:33,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:42:33,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395100194] [2021-11-21 00:42:33,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:33,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:42:33,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:42:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:42:33,706 INFO L87 Difference]: Start difference. First operand 74907 states and 103801 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 00:42:39,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:42:41,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:42:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:42:43,689 INFO L93 Difference]: Finished difference Result 149946 states and 207816 transitions. [2021-11-21 00:42:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:42:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 225 [2021-11-21 00:42:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:42:44,079 INFO L225 Difference]: With dead ends: 149946 [2021-11-21 00:42:44,080 INFO L226 Difference]: Without dead ends: 75035 [2021-11-21 00:42:44,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:42:44,296 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 26 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4193 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:42:44,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 4193 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 622 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 00:42:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75035 states. [2021-11-21 00:42:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75035 to 74919. [2021-11-21 00:42:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74919 states, 48407 states have (on average 1.3306959737228088) internal successors, (64415), 50145 states have internal predecessors, (64415), 19650 states have call successors, (19650), 6925 states have call predecessors, (19650), 6861 states have return successors, (19739), 19081 states have call predecessors, (19739), 19643 states have call successors, (19739) [2021-11-21 00:42:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74919 states to 74919 states and 103804 transitions. [2021-11-21 00:42:47,497 INFO L78 Accepts]: Start accepts. Automaton has 74919 states and 103804 transitions. Word has length 225 [2021-11-21 00:42:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:42:47,497 INFO L470 AbstractCegarLoop]: Abstraction has 74919 states and 103804 transitions. [2021-11-21 00:42:47,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (38), 2 states have call predecessors, (38), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-21 00:42:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 74919 states and 103804 transitions. [2021-11-21 00:42:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-21 00:42:47,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:42:47,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:42:47,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:42:47,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:47,793 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:42:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:42:47,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1217999091, now seen corresponding path program 1 times [2021-11-21 00:42:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:42:47,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631474661] [2021-11-21 00:42:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:47,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:42:47,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:42:47,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337577249] [2021-11-21 00:42:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:42:47,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:42:47,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:42:47,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:42:47,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:42:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:42:48,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:42:48,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:42:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-21 00:42:49,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:42:49,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:42:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631474661] [2021-11-21 00:42:49,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:42:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337577249] [2021-11-21 00:42:49,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337577249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:42:49,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:42:49,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:42:49,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681191446] [2021-11-21 00:42:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:42:49,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:42:49,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:42:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:42:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:42:49,089 INFO L87 Difference]: Start difference. First operand 74919 states and 103804 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 00:42:56,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:42:58,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:00,878 INFO L93 Difference]: Finished difference Result 157548 states and 220721 transitions. [2021-11-21 00:43:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:43:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) Word has length 227 [2021-11-21 00:43:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:01,424 INFO L225 Difference]: With dead ends: 157548 [2021-11-21 00:43:01,424 INFO L226 Difference]: Without dead ends: 82652 [2021-11-21 00:43:01,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:43:01,717 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 159 mSDsluCounter, 10786 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 11112 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:01,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 11112 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1581 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2021-11-21 00:43:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82652 states. [2021-11-21 00:43:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82652 to 75231. [2021-11-21 00:43:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75231 states, 48641 states have (on average 1.3291050759647212) internal successors, (64649), 50379 states have internal predecessors, (64649), 19650 states have call successors, (19650), 6925 states have call predecessors, (19650), 6939 states have return successors, (20083), 19159 states have call predecessors, (20083), 19643 states have call successors, (20083) [2021-11-21 00:43:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75231 states to 75231 states and 104382 transitions. [2021-11-21 00:43:05,516 INFO L78 Accepts]: Start accepts. Automaton has 75231 states and 104382 transitions. Word has length 227 [2021-11-21 00:43:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:43:05,517 INFO L470 AbstractCegarLoop]: Abstraction has 75231 states and 104382 transitions. [2021-11-21 00:43:05,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 6 states have internal predecessors, (110), 2 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-21 00:43:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 75231 states and 104382 transitions. [2021-11-21 00:43:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-21 00:43:05,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:43:05,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:43:05,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:43:05,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cec2f36-6ca3-49d6-a35d-15098248412b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:43:05,804 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:43:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:43:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash 382504243, now seen corresponding path program 1 times [2021-11-21 00:43:05,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:43:05,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98285790] [2021-11-21 00:43:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:43:05,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:43:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:43:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-21 00:43:06,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:43:06,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98285790] [2021-11-21 00:43:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98285790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:43:06,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:43:06,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:43:06,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289744347] [2021-11-21 00:43:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:43:06,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:43:06,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:43:06,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:43:06,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:43:06,034 INFO L87 Difference]: Start difference. First operand 75231 states and 104382 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 00:43:12,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:43:14,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:43:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:43:16,850 INFO L93 Difference]: Finished difference Result 150715 states and 209360 transitions. [2021-11-21 00:43:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:43:16,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) Word has length 251 [2021-11-21 00:43:16,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:43:17,429 INFO L225 Difference]: With dead ends: 150715 [2021-11-21 00:43:17,430 INFO L226 Difference]: Without dead ends: 75507 [2021-11-21 00:43:17,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:43:17,754 INFO L933 BasicCegarLoop]: 1403 mSDtfsCounter, 127 mSDsluCounter, 4612 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 5433 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:43:17,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 5433 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 810 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2021-11-21 00:43:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75507 states.