./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:28:45,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:28:45,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:28:45,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:28:45,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:28:45,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:28:45,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:28:45,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:28:45,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:28:45,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:28:45,111 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:28:45,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:28:45,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:28:45,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:28:45,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:28:45,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:28:45,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:28:45,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:28:45,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:28:45,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:28:45,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:28:45,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:28:45,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:28:45,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:28:45,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:28:45,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:28:45,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:28:45,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:28:45,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:28:45,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:28:45,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:28:45,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:28:45,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:28:45,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:28:45,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:28:45,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:28:45,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:28:45,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:28:45,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:28:45,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:28:45,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:28:45,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:28:45,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:28:45,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:28:45,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:28:45,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:28:45,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:28:45,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:28:45,207 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:28:45,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:28:45,208 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:28:45,208 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:28:45,209 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:28:45,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:28:45,210 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:28:45,210 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:28:45,210 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:28:45,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:28:45,211 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:28:45,211 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:28:45,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:28:45,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:28:45,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:28:45,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:28:45,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:28:45,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:28:45,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:28:45,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:28:45,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:28:45,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:28:45,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:28:45,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:28:45,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:28:45,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:28:45,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:28:45,217 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:28:45,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:28:45,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:28:45,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:28:45,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:28:45,219 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_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2021-11-23 03:28:45,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:28:45,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:28:45,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:28:45,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:28:45,516 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:28:45,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-23 03:28:45,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/data/3afe6f111/09da5916e66746298b3d53b2ba6ceb90/FLAGa1c7fbdc8 [2021-11-23 03:28:46,505 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:28:46,506 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-23 03:28:46,559 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/data/3afe6f111/09da5916e66746298b3d53b2ba6ceb90/FLAGa1c7fbdc8 [2021-11-23 03:28:46,987 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/data/3afe6f111/09da5916e66746298b3d53b2ba6ceb90 [2021-11-23 03:28:46,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:28:46,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:28:46,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:28:46,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:28:47,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:28:47,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:46" (1/1) ... [2021-11-23 03:28:47,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fedba04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:47, skipping insertion in model container [2021-11-23 03:28:47,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:28:46" (1/1) ... [2021-11-23 03:28:47,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:28:47,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:28:48,366 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_0c5e7ccb-20b2-4208-86fe-55f252167038/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-23 03:28:49,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:28:49,198 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:28:49,368 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_0c5e7ccb-20b2-4208-86fe-55f252167038/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-23 03:28:49,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:28:49,838 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:28:49,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49 WrapperNode [2021-11-23 03:28:49,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:28:49,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:28:49,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:28:49,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:28:49,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:49,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,346 INFO L137 Inliner]: procedures = 245, calls = 3306, calls flagged for inlining = 118, calls inlined = 118, statements flattened = 6412 [2021-11-23 03:28:50,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:28:50,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:28:50,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:28:50,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:28:50,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:28:50,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:28:50,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:28:50,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:28:50,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (1/1) ... [2021-11-23 03:28:50,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:28:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:28:50,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:28:50,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:28:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-23 03:28:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-23 03:28:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-23 03:28:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-23 03:28:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_18 [2021-11-23 03:28:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_18 [2021-11-23 03:28:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:28:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:28:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:28:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:28:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_destruct [2021-11-23 03:28:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_destruct [2021-11-23 03:28:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-23 03:28:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-23 03:28:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-23 03:28:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-23 03:28:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_22 [2021-11-23 03:28:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_22 [2021-11-23 03:28:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-23 03:28:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-23 03:28:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:28:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:28:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-23 03:28:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-23 03:28:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-23 03:28:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-23 03:28:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-23 03:28:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-23 03:28:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:28:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:28:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:28:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:28:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-23 03:28:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-23 03:28:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-23 03:28:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-23 03:28:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:28:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:28:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:28:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:28:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-23 03:28:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-23 03:28:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:28:50,719 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:28:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-23 03:28:50,719 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-23 03:28:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-23 03:28:50,719 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-23 03:28:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-23 03:28:50,720 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-23 03:28:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:28:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 03:28:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-23 03:28:50,720 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-23 03:28:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-23 03:28:50,721 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-23 03:28:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:28:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-23 03:28:50,721 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-23 03:28:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-23 03:28:50,722 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-23 03:28:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-23 03:28:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:28:50,722 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:28:50,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2021-11-23 03:28:50,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2021-11-23 03:28:50,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:28:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:28:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 03:28:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 03:28:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-23 03:28:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-23 03:28:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:28:50,771 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:28:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:28:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:28:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 03:28:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 03:28:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-23 03:28:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-23 03:28:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_shutdown [2021-11-23 03:28:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_shutdown [2021-11-23 03:28:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2021-11-23 03:28:50,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2021-11-23 03:28:50,773 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-23 03:28:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-23 03:28:50,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:28:50,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 03:28:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 03:28:50,773 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 03:28:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 03:28:50,773 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-23 03:28:50,773 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-23 03:28:50,774 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-23 03:28:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-23 03:28:50,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:28:50,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2021-11-23 03:28:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2021-11-23 03:28:50,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2021-11-23 03:28:50,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2021-11-23 03:28:50,774 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2021-11-23 03:28:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2021-11-23 03:28:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:28:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-23 03:28:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-23 03:28:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-23 03:28:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-23 03:28:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:28:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:28:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 03:28:50,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 03:28:50,775 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-23 03:28:50,776 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-23 03:28:50,776 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-23 03:28:50,776 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-23 03:28:50,776 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 03:28:50,776 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 03:28:50,776 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 03:28:50,776 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 03:28:50,776 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-23 03:28:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-23 03:28:50,777 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-23 03:28:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-23 03:28:50,777 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:28:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:28:50,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:28:50,777 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-23 03:28:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-23 03:28:50,777 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-23 03:28:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-23 03:28:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-23 03:28:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-23 03:28:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 03:28:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 03:28:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:28:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:28:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-23 03:28:50,778 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-23 03:28:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-23 03:28:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2021-11-23 03:28:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 03:28:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_int_urb_17 [2021-11-23 03:28:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_int_urb_17 [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:28:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:28:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 03:28:50,779 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_irq [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_irq [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-23 03:28:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 03:28:50,780 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-23 03:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-23 03:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-23 03:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-23 03:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:28:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-23 03:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-23 03:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_bulk_callback [2021-11-23 03:28:50,782 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_bulk_callback [2021-11-23 03:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:28:50,782 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:28:51,521 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:28:51,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:28:51,800 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:28:52,501 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-23 03:29:01,106 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:29:02,187 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:29:02,187 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:29:02,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:02 BoogieIcfgContainer [2021-11-23 03:29:02,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:29:02,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:29:02,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:29:02,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:29:02,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:28:46" (1/3) ... [2021-11-23 03:29:02,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:29:02, skipping insertion in model container [2021-11-23 03:29:02,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:28:49" (2/3) ... [2021-11-23 03:29:02,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6e9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:29:02, skipping insertion in model container [2021-11-23 03:29:02,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:29:02" (3/3) ... [2021-11-23 03:29:02,208 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-23 03:29:02,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:29:02,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:29:02,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:29:02,293 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:29:02,293 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:29:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 1137 states, 708 states have (on average 1.3573446327683616) internal successors, (961), 744 states have internal predecessors, (961), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2021-11-23 03:29:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-23 03:29:02,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:02,384 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:02,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:29:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:02,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1213321231, now seen corresponding path program 1 times [2021-11-23 03:29:02,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:02,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255203155] [2021-11-23 03:29:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:02,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:29:03,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:03,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255203155] [2021-11-23 03:29:03,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255203155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:03,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:03,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:29:03,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106493878] [2021-11-23 03:29:03,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:03,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:29:03,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:29:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:29:03,383 INFO L87 Difference]: Start difference. First operand has 1137 states, 708 states have (on average 1.3573446327683616) internal successors, (961), 744 states have internal predecessors, (961), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:29:07,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:09,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:18,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:19,676 INFO L93 Difference]: Finished difference Result 4091 states and 5975 transitions. [2021-11-23 03:29:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:29:19,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 110 [2021-11-23 03:29:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:19,737 INFO L225 Difference]: With dead ends: 4091 [2021-11-23 03:29:19,737 INFO L226 Difference]: Without dead ends: 2944 [2021-11-23 03:29:19,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:29:19,760 INFO L933 BasicCegarLoop]: 2226 mSDtfsCounter, 3298 mSDsluCounter, 7743 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 450 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 8712 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:19,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3401 Valid, 8712 Invalid, 5153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [450 Valid, 4700 Invalid, 3 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 03:29:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-11-23 03:29:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2907. [2021-11-23 03:29:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 1857 states have (on average 1.3527194399569198) internal successors, (2512), 1912 states have internal predecessors, (2512), 828 states have call successors, (828), 222 states have call predecessors, (828), 221 states have return successors, (822), 798 states have call predecessors, (822), 822 states have call successors, (822) [2021-11-23 03:29:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4162 transitions. [2021-11-23 03:29:20,101 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4162 transitions. Word has length 110 [2021-11-23 03:29:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:20,104 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 4162 transitions. [2021-11-23 03:29:20,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:29:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4162 transitions. [2021-11-23 03:29:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 03:29:20,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:20,115 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:20,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:29:20,116 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:29:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1017983192, now seen corresponding path program 1 times [2021-11-23 03:29:20,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:20,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897019956] [2021-11-23 03:29:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:20,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:29:20,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:20,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897019956] [2021-11-23 03:29:20,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897019956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:20,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:20,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:29:20,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406886003] [2021-11-23 03:29:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:20,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:20,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:20,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:20,593 INFO L87 Difference]: Start difference. First operand 2907 states and 4162 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:23,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:25,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:28,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:28,833 INFO L93 Difference]: Finished difference Result 5624 states and 8040 transitions. [2021-11-23 03:29:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2021-11-23 03:29:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:28,880 INFO L225 Difference]: With dead ends: 5624 [2021-11-23 03:29:28,881 INFO L226 Difference]: Without dead ends: 5621 [2021-11-23 03:29:28,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:28,885 INFO L933 BasicCegarLoop]: 1916 mSDtfsCounter, 1331 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:28,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1331 Valid, 3276 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 463 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2021-11-23 03:29:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2021-11-23 03:29:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5602. [2021-11-23 03:29:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 3594 states have (on average 1.3561491374513077) internal successors, (4874), 3697 states have internal predecessors, (4874), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2021-11-23 03:29:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 8014 transitions. [2021-11-23 03:29:29,217 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 8014 transitions. Word has length 121 [2021-11-23 03:29:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:29,218 INFO L470 AbstractCegarLoop]: Abstraction has 5602 states and 8014 transitions. [2021-11-23 03:29:29,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 8014 transitions. [2021-11-23 03:29:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 03:29:29,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:29,231 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:29,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:29:29,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:29:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:29,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1492005153, now seen corresponding path program 1 times [2021-11-23 03:29:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:29,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082639837] [2021-11-23 03:29:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:29,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:29:29,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:29,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082639837] [2021-11-23 03:29:29,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082639837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:29,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:29,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:29:29,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267332306] [2021-11-23 03:29:29,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:29,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:29,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:29,640 INFO L87 Difference]: Start difference. First operand 5602 states and 8014 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:32,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:36,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:36,300 INFO L93 Difference]: Finished difference Result 5623 states and 8038 transitions. [2021-11-23 03:29:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2021-11-23 03:29:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:36,348 INFO L225 Difference]: With dead ends: 5623 [2021-11-23 03:29:36,348 INFO L226 Difference]: Without dead ends: 5620 [2021-11-23 03:29:36,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:36,356 INFO L933 BasicCegarLoop]: 1918 mSDtfsCounter, 1329 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:36,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1329 Valid, 3280 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 03:29:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5620 states. [2021-11-23 03:29:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5620 to 5603. [2021-11-23 03:29:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 3595 states have (on average 1.3560500695410291) internal successors, (4875), 3698 states have internal predecessors, (4875), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2021-11-23 03:29:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8015 transitions. [2021-11-23 03:29:36,738 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8015 transitions. Word has length 122 [2021-11-23 03:29:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 8015 transitions. [2021-11-23 03:29:36,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8015 transitions. [2021-11-23 03:29:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 03:29:36,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:36,744 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:36,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:29:36,745 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:29:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash -993178373, now seen corresponding path program 1 times [2021-11-23 03:29:36,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:36,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719804973] [2021-11-23 03:29:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:36,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:29:37,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719804973] [2021-11-23 03:29:37,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719804973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:37,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:37,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:29:37,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21547581] [2021-11-23 03:29:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:37,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:37,058 INFO L87 Difference]: Start difference. First operand 5603 states and 8015 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:39,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:42,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:45,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:45,728 INFO L93 Difference]: Finished difference Result 5633 states and 8046 transitions. [2021-11-23 03:29:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 123 [2021-11-23 03:29:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:45,769 INFO L225 Difference]: With dead ends: 5633 [2021-11-23 03:29:45,769 INFO L226 Difference]: Without dead ends: 5630 [2021-11-23 03:29:45,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:45,777 INFO L933 BasicCegarLoop]: 1917 mSDtfsCounter, 1322 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:45,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1324 Valid, 3274 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 457 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 03:29:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5630 states. [2021-11-23 03:29:46,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5630 to 5610. [2021-11-23 03:29:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5610 states, 3599 states have (on average 1.3556543484301196) internal successors, (4879), 3702 states have internal predecessors, (4879), 1573 states have call successors, (1573), 438 states have call predecessors, (1573), 437 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2021-11-23 03:29:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 8019 transitions. [2021-11-23 03:29:46,101 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 8019 transitions. Word has length 123 [2021-11-23 03:29:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:46,103 INFO L470 AbstractCegarLoop]: Abstraction has 5610 states and 8019 transitions. [2021-11-23 03:29:46,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 8019 transitions. [2021-11-23 03:29:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 03:29:46,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:46,108 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:46,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:29:46,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:29:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:46,112 INFO L85 PathProgramCache]: Analyzing trace with hash -724451484, now seen corresponding path program 1 times [2021-11-23 03:29:46,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:46,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476152792] [2021-11-23 03:29:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:46,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:29:46,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:46,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476152792] [2021-11-23 03:29:46,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476152792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:46,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:46,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:29:46,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995512544] [2021-11-23 03:29:46,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:46,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:46,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:46,400 INFO L87 Difference]: Start difference. First operand 5610 states and 8019 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:49,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:52,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:52,310 INFO L93 Difference]: Finished difference Result 8189 states and 11759 transitions. [2021-11-23 03:29:52,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 124 [2021-11-23 03:29:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:52,365 INFO L225 Difference]: With dead ends: 8189 [2021-11-23 03:29:52,366 INFO L226 Difference]: Without dead ends: 8186 [2021-11-23 03:29:52,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:52,372 INFO L933 BasicCegarLoop]: 1896 mSDtfsCounter, 1252 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:52,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 3279 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 03:29:52,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2021-11-23 03:29:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 8167. [2021-11-23 03:29:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 5249 states have (on average 1.35892550962088) internal successors, (7133), 5406 states have internal predecessors, (7133), 2270 states have call successors, (2270), 651 states have call predecessors, (2270), 647 states have return successors, (2333), 2183 states have call predecessors, (2333), 2264 states have call successors, (2333) [2021-11-23 03:29:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 11736 transitions. [2021-11-23 03:29:52,786 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 11736 transitions. Word has length 124 [2021-11-23 03:29:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:29:52,787 INFO L470 AbstractCegarLoop]: Abstraction has 8167 states and 11736 transitions. [2021-11-23 03:29:52,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 11736 transitions. [2021-11-23 03:29:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 03:29:52,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:29:52,792 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:29:52,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:29:52,792 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:29:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:29:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash -983847650, now seen corresponding path program 1 times [2021-11-23 03:29:52,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:29:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129504744] [2021-11-23 03:29:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:29:52,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:29:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:29:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:29:53,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:29:53,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129504744] [2021-11-23 03:29:53,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129504744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:29:53,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:29:53,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:29:53,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364428663] [2021-11-23 03:29:53,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:29:53,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:29:53,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:29:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:29:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:53,105 INFO L87 Difference]: Start difference. First operand 8167 states and 11736 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:29:56,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:59,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:29:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:29:59,537 INFO L93 Difference]: Finished difference Result 8184 states and 11754 transitions. [2021-11-23 03:29:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:29:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 125 [2021-11-23 03:29:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:29:59,597 INFO L225 Difference]: With dead ends: 8184 [2021-11-23 03:29:59,597 INFO L226 Difference]: Without dead ends: 8167 [2021-11-23 03:29:59,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:29:59,605 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 1322 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:29:59,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 3210 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-23 03:29:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2021-11-23 03:29:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 8155. [2021-11-23 03:29:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8155 states, 5241 states have (on average 1.3589009730967372) internal successors, (7122), 5398 states have internal predecessors, (7122), 2268 states have call successors, (2268), 649 states have call predecessors, (2268), 645 states have return successors, (2331), 2181 states have call predecessors, (2331), 2262 states have call successors, (2331) [2021-11-23 03:30:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8155 states to 8155 states and 11721 transitions. [2021-11-23 03:30:00,113 INFO L78 Accepts]: Start accepts. Automaton has 8155 states and 11721 transitions. Word has length 125 [2021-11-23 03:30:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:00,114 INFO L470 AbstractCegarLoop]: Abstraction has 8155 states and 11721 transitions. [2021-11-23 03:30:00,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:30:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 8155 states and 11721 transitions. [2021-11-23 03:30:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-23 03:30:00,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:00,120 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:00,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:30:00,120 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:00,121 INFO L85 PathProgramCache]: Analyzing trace with hash 431759152, now seen corresponding path program 1 times [2021-11-23 03:30:00,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:00,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257948917] [2021-11-23 03:30:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:00,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:30:00,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:00,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257948917] [2021-11-23 03:30:00,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257948917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:00,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:00,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:00,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936301997] [2021-11-23 03:30:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:00,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:00,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:00,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:00,448 INFO L87 Difference]: Start difference. First operand 8155 states and 11721 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:03,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:05,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:07,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:08,369 INFO L93 Difference]: Finished difference Result 10896 states and 15639 transitions. [2021-11-23 03:30:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:08,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2021-11-23 03:30:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:08,424 INFO L225 Difference]: With dead ends: 10896 [2021-11-23 03:30:08,424 INFO L226 Difference]: Without dead ends: 10893 [2021-11-23 03:30:08,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:08,434 INFO L933 BasicCegarLoop]: 1677 mSDtfsCounter, 1341 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:08,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 3037 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 407 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 03:30:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10893 states. [2021-11-23 03:30:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10893 to 10841. [2021-11-23 03:30:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10841 states, 6974 states have (on average 1.3593346716375108) internal successors, (9480), 7179 states have internal predecessors, (9480), 3011 states have call successors, (3011), 859 states have call predecessors, (3011), 855 states have return successors, (3080), 2900 states have call predecessors, (3080), 3005 states have call successors, (3080) [2021-11-23 03:30:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10841 states to 10841 states and 15571 transitions. [2021-11-23 03:30:09,093 INFO L78 Accepts]: Start accepts. Automaton has 10841 states and 15571 transitions. Word has length 126 [2021-11-23 03:30:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:09,094 INFO L470 AbstractCegarLoop]: Abstraction has 10841 states and 15571 transitions. [2021-11-23 03:30:09,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 10841 states and 15571 transitions. [2021-11-23 03:30:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 03:30:09,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:09,099 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:09,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:30:09,100 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash 498929097, now seen corresponding path program 1 times [2021-11-23 03:30:09,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:09,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169747478] [2021-11-23 03:30:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:09,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:30:09,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:09,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169747478] [2021-11-23 03:30:09,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169747478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:09,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:09,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:09,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007241851] [2021-11-23 03:30:09,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:09,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:09,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:09,528 INFO L87 Difference]: Start difference. First operand 10841 states and 15571 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:12,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:14,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:15,754 INFO L93 Difference]: Finished difference Result 10898 states and 15631 transitions. [2021-11-23 03:30:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 127 [2021-11-23 03:30:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:15,808 INFO L225 Difference]: With dead ends: 10898 [2021-11-23 03:30:15,808 INFO L226 Difference]: Without dead ends: 10895 [2021-11-23 03:30:15,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:15,818 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 1343 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:15,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 3042 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 03:30:15,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2021-11-23 03:30:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 10869. [2021-11-23 03:30:16,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10869 states, 6990 states have (on average 1.3589413447782546) internal successors, (9499), 7195 states have internal predecessors, (9499), 3017 states have call successors, (3017), 865 states have call predecessors, (3017), 861 states have return successors, (3080), 2906 states have call predecessors, (3080), 3011 states have call successors, (3080) [2021-11-23 03:30:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10869 states to 10869 states and 15596 transitions. [2021-11-23 03:30:16,545 INFO L78 Accepts]: Start accepts. Automaton has 10869 states and 15596 transitions. Word has length 127 [2021-11-23 03:30:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:16,546 INFO L470 AbstractCegarLoop]: Abstraction has 10869 states and 15596 transitions. [2021-11-23 03:30:16,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 10869 states and 15596 transitions. [2021-11-23 03:30:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 03:30:16,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:16,552 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:16,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:30:16,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1713765037, now seen corresponding path program 1 times [2021-11-23 03:30:16,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:16,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118468415] [2021-11-23 03:30:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:16,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:30:16,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:16,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118468415] [2021-11-23 03:30:16,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118468415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:16,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:16,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:16,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831945681] [2021-11-23 03:30:16,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:16,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:16,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:16,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:16,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:16,822 INFO L87 Difference]: Start difference. First operand 10869 states and 15596 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:19,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:22,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:23,133 INFO L93 Difference]: Finished difference Result 10884 states and 15612 transitions. [2021-11-23 03:30:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:23,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 128 [2021-11-23 03:30:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:23,182 INFO L225 Difference]: With dead ends: 10884 [2021-11-23 03:30:23,183 INFO L226 Difference]: Without dead ends: 10881 [2021-11-23 03:30:23,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:23,191 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 1340 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:23,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 3037 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 03:30:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-11-23 03:30:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10870. [2021-11-23 03:30:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10870 states, 6991 states have (on average 1.3588900014304106) internal successors, (9500), 7196 states have internal predecessors, (9500), 3017 states have call successors, (3017), 865 states have call predecessors, (3017), 861 states have return successors, (3080), 2906 states have call predecessors, (3080), 3011 states have call successors, (3080) [2021-11-23 03:30:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10870 states to 10870 states and 15597 transitions. [2021-11-23 03:30:23,790 INFO L78 Accepts]: Start accepts. Automaton has 10870 states and 15597 transitions. Word has length 128 [2021-11-23 03:30:23,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:23,791 INFO L470 AbstractCegarLoop]: Abstraction has 10870 states and 15597 transitions. [2021-11-23 03:30:23,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:23,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10870 states and 15597 transitions. [2021-11-23 03:30:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 03:30:23,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:23,796 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:23,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:30:23,796 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1587801588, now seen corresponding path program 1 times [2021-11-23 03:30:23,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:23,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324750258] [2021-11-23 03:30:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:23,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:30:24,049 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324750258] [2021-11-23 03:30:24,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324750258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:24,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:24,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:24,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549383125] [2021-11-23 03:30:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:24,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:24,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:24,052 INFO L87 Difference]: Start difference. First operand 10870 states and 15597 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:26,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:29,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:30,076 INFO L93 Difference]: Finished difference Result 13470 states and 19365 transitions. [2021-11-23 03:30:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 129 [2021-11-23 03:30:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:30,137 INFO L225 Difference]: With dead ends: 13470 [2021-11-23 03:30:30,138 INFO L226 Difference]: Without dead ends: 13467 [2021-11-23 03:30:30,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:30,145 INFO L933 BasicCegarLoop]: 1745 mSDtfsCounter, 1266 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:30,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 3128 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 03:30:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-11-23 03:30:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 13439. [2021-11-23 03:30:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 8649 states have (on average 1.3602728639149035) internal successors, (11765), 8908 states have internal predecessors, (11765), 3718 states have call successors, (3718), 1078 states have call predecessors, (3718), 1071 states have return successors, (3850), 3574 states have call predecessors, (3850), 3712 states have call successors, (3850) [2021-11-23 03:30:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 19333 transitions. [2021-11-23 03:30:30,840 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 19333 transitions. Word has length 129 [2021-11-23 03:30:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:30,841 INFO L470 AbstractCegarLoop]: Abstraction has 13439 states and 19333 transitions. [2021-11-23 03:30:30,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 19333 transitions. [2021-11-23 03:30:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 03:30:30,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:30,846 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:30,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:30:30,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:30,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1977897098, now seen corresponding path program 1 times [2021-11-23 03:30:30,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:30,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326795281] [2021-11-23 03:30:30,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:30,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-23 03:30:31,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:31,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326795281] [2021-11-23 03:30:31,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326795281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:31,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:31,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:31,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076799134] [2021-11-23 03:30:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:31,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:31,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:31,096 INFO L87 Difference]: Start difference. First operand 13439 states and 19333 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:33,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:36,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:37,329 INFO L93 Difference]: Finished difference Result 13456 states and 19351 transitions. [2021-11-23 03:30:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 130 [2021-11-23 03:30:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:37,399 INFO L225 Difference]: With dead ends: 13456 [2021-11-23 03:30:37,400 INFO L226 Difference]: Without dead ends: 13443 [2021-11-23 03:30:37,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:37,413 INFO L933 BasicCegarLoop]: 1681 mSDtfsCounter, 1336 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:37,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1336 Valid, 3044 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 403 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-11-23 03:30:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13443 states. [2021-11-23 03:30:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13443 to 13425. [2021-11-23 03:30:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13425 states, 8637 states have (on average 1.3604260738682412) internal successors, (11750), 8897 states have internal predecessors, (11750), 3716 states have call successors, (3716), 1078 states have call predecessors, (3716), 1071 states have return successors, (3848), 3571 states have call predecessors, (3848), 3710 states have call successors, (3848) [2021-11-23 03:30:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13425 states to 13425 states and 19314 transitions. [2021-11-23 03:30:38,165 INFO L78 Accepts]: Start accepts. Automaton has 13425 states and 19314 transitions. Word has length 130 [2021-11-23 03:30:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 13425 states and 19314 transitions. [2021-11-23 03:30:38,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:30:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 13425 states and 19314 transitions. [2021-11-23 03:30:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-23 03:30:38,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:38,174 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-23 03:30:38,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:30:38,175 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -203590507, now seen corresponding path program 1 times [2021-11-23 03:30:38,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:38,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413606392] [2021-11-23 03:30:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:38,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-11-23 03:30:38,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413606392] [2021-11-23 03:30:38,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413606392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:38,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:38,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:38,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129577738] [2021-11-23 03:30:38,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:38,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:38,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:38,424 INFO L87 Difference]: Start difference. First operand 13425 states and 19314 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 03:30:40,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:43,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:46,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:46,901 INFO L93 Difference]: Finished difference Result 39314 states and 56516 transitions. [2021-11-23 03:30:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:46,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 140 [2021-11-23 03:30:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:47,014 INFO L225 Difference]: With dead ends: 39314 [2021-11-23 03:30:47,014 INFO L226 Difference]: Without dead ends: 25929 [2021-11-23 03:30:47,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:47,078 INFO L933 BasicCegarLoop]: 1817 mSDtfsCounter, 1283 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 3170 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:47,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1285 Valid, 3170 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 454 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 03:30:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25929 states. [2021-11-23 03:30:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25929 to 25815. [2021-11-23 03:30:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25815 states, 16628 states have (on average 1.3615588164541736) internal successors, (22640), 17136 states have internal predecessors, (22640), 7089 states have call successors, (7089), 2110 states have call predecessors, (7089), 2097 states have return successors, (7383), 6810 states have call predecessors, (7383), 7083 states have call successors, (7383) [2021-11-23 03:30:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25815 states to 25815 states and 37112 transitions. [2021-11-23 03:30:48,940 INFO L78 Accepts]: Start accepts. Automaton has 25815 states and 37112 transitions. Word has length 140 [2021-11-23 03:30:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:48,940 INFO L470 AbstractCegarLoop]: Abstraction has 25815 states and 37112 transitions. [2021-11-23 03:30:48,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 03:30:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 25815 states and 37112 transitions. [2021-11-23 03:30:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-23 03:30:48,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:48,970 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:48,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:30:48,970 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1418385877, now seen corresponding path program 1 times [2021-11-23 03:30:48,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:48,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778664267] [2021-11-23 03:30:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:48,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-23 03:30:49,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:49,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778664267] [2021-11-23 03:30:49,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778664267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:49,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:49,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:49,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474485342] [2021-11-23 03:30:49,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:49,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:49,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:49,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:49,207 INFO L87 Difference]: Start difference. First operand 25815 states and 37112 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:30:51,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:54,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:30:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:55,096 INFO L93 Difference]: Finished difference Result 44954 states and 64574 transitions. [2021-11-23 03:30:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:55,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 172 [2021-11-23 03:30:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:55,175 INFO L225 Difference]: With dead ends: 44954 [2021-11-23 03:30:55,175 INFO L226 Difference]: Without dead ends: 19174 [2021-11-23 03:30:55,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:55,277 INFO L933 BasicCegarLoop]: 1417 mSDtfsCounter, 17 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:55,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2820 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 03:30:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-11-23 03:30:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 19058. [2021-11-23 03:30:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19058 states, 12250 states have (on average 1.360326530612245) internal successors, (16664), 12627 states have internal predecessors, (16664), 5241 states have call successors, (5241), 1576 states have call predecessors, (5241), 1566 states have return successors, (5457), 5032 states have call predecessors, (5457), 5235 states have call successors, (5457) [2021-11-23 03:30:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19058 states to 19058 states and 27362 transitions. [2021-11-23 03:30:56,426 INFO L78 Accepts]: Start accepts. Automaton has 19058 states and 27362 transitions. Word has length 172 [2021-11-23 03:30:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:56,427 INFO L470 AbstractCegarLoop]: Abstraction has 19058 states and 27362 transitions. [2021-11-23 03:30:56,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:30:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19058 states and 27362 transitions. [2021-11-23 03:30:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-23 03:30:56,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:56,459 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-23 03:30:56,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:30:56,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1488019229, now seen corresponding path program 1 times [2021-11-23 03:30:56,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:56,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173445200] [2021-11-23 03:30:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:56,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-23 03:30:56,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:56,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173445200] [2021-11-23 03:30:56,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173445200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:56,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:56,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:56,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803151867] [2021-11-23 03:30:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:56,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:56,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:56,678 INFO L87 Difference]: Start difference. First operand 19058 states and 27362 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:30:59,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:01,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:04,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:05,329 INFO L93 Difference]: Finished difference Result 49747 states and 70978 transitions. [2021-11-23 03:31:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 188 [2021-11-23 03:31:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:05,451 INFO L225 Difference]: With dead ends: 49747 [2021-11-23 03:31:05,451 INFO L226 Difference]: Without dead ends: 30729 [2021-11-23 03:31:05,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:05,654 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 993 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 2975 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2975 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 498 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 03:31:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30729 states. [2021-11-23 03:31:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30729 to 30621. [2021-11-23 03:31:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30621 states, 19573 states have (on average 1.3514024421396822) internal successors, (26451), 20264 states have internal predecessors, (26451), 8356 states have call successors, (8356), 2709 states have call predecessors, (8356), 2691 states have return successors, (8725), 7963 states have call predecessors, (8725), 8350 states have call successors, (8725) [2021-11-23 03:31:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30621 states to 30621 states and 43532 transitions. [2021-11-23 03:31:07,043 INFO L78 Accepts]: Start accepts. Automaton has 30621 states and 43532 transitions. Word has length 188 [2021-11-23 03:31:07,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:07,044 INFO L470 AbstractCegarLoop]: Abstraction has 30621 states and 43532 transitions. [2021-11-23 03:31:07,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-23 03:31:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 30621 states and 43532 transitions. [2021-11-23 03:31:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-23 03:31:07,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:07,094 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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] [2021-11-23 03:31:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:31:07,095 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -559222454, now seen corresponding path program 1 times [2021-11-23 03:31:07,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:07,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855303883] [2021-11-23 03:31:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:07,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2021-11-23 03:31:07,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855303883] [2021-11-23 03:31:07,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855303883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:07,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:07,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:07,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557998388] [2021-11-23 03:31:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:07,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:07,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:07,614 INFO L87 Difference]: Start difference. First operand 30621 states and 43532 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 03:31:10,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:13,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:14,581 INFO L93 Difference]: Finished difference Result 48482 states and 68878 transitions. [2021-11-23 03:31:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:31:14,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 189 [2021-11-23 03:31:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:14,639 INFO L225 Difference]: With dead ends: 48482 [2021-11-23 03:31:14,639 INFO L226 Difference]: Without dead ends: 19011 [2021-11-23 03:31:14,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:14,699 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 26 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4232 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:14,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 4232 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 610 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 03:31:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19011 states. [2021-11-23 03:31:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19011 to 18915. [2021-11-23 03:31:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18915 states, 12088 states have (on average 1.3503474520185308) internal successors, (16323), 12514 states have internal predecessors, (16323), 5167 states have call successors, (5167), 1669 states have call predecessors, (5167), 1659 states have return successors, (5360), 4927 states have call predecessors, (5360), 5161 states have call successors, (5360) [2021-11-23 03:31:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18915 states to 18915 states and 26850 transitions. [2021-11-23 03:31:15,647 INFO L78 Accepts]: Start accepts. Automaton has 18915 states and 26850 transitions. Word has length 189 [2021-11-23 03:31:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:15,647 INFO L470 AbstractCegarLoop]: Abstraction has 18915 states and 26850 transitions. [2021-11-23 03:31:15,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 03:31:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18915 states and 26850 transitions. [2021-11-23 03:31:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-23 03:31:15,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:15,666 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-23 03:31:15,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:31:15,667 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -697895588, now seen corresponding path program 1 times [2021-11-23 03:31:15,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:15,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040706648] [2021-11-23 03:31:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:15,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-23 03:31:15,919 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:15,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040706648] [2021-11-23 03:31:15,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040706648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:15,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:15,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:15,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879604307] [2021-11-23 03:31:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:15,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:15,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:15,925 INFO L87 Difference]: Start difference. First operand 18915 states and 26850 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:31:18,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:22,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:22,824 INFO L93 Difference]: Finished difference Result 46976 states and 66397 transitions. [2021-11-23 03:31:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:22,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 189 [2021-11-23 03:31:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:22,952 INFO L225 Difference]: With dead ends: 46976 [2021-11-23 03:31:22,952 INFO L226 Difference]: Without dead ends: 28112 [2021-11-23 03:31:23,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:23,183 INFO L933 BasicCegarLoop]: 2149 mSDtfsCounter, 1058 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 3491 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 517 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 03:31:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28112 states. [2021-11-23 03:31:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28112 to 27938. [2021-11-23 03:31:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27938 states, 17870 states have (on average 1.34482372691662) internal successors, (24032), 18471 states have internal predecessors, (24032), 7542 states have call successors, (7542), 2540 states have call predecessors, (7542), 2525 states have return successors, (7800), 7180 states have call predecessors, (7800), 7536 states have call successors, (7800) [2021-11-23 03:31:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 39374 transitions. [2021-11-23 03:31:24,426 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 39374 transitions. Word has length 189 [2021-11-23 03:31:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:24,426 INFO L470 AbstractCegarLoop]: Abstraction has 27938 states and 39374 transitions. [2021-11-23 03:31:24,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-23 03:31:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 39374 transitions. [2021-11-23 03:31:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-23 03:31:24,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:24,454 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:24,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 03:31:24,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1276952250, now seen corresponding path program 1 times [2021-11-23 03:31:24,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:24,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137889263] [2021-11-23 03:31:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:24,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-23 03:31:24,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:24,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137889263] [2021-11-23 03:31:24,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137889263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:24,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:24,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:31:24,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576429334] [2021-11-23 03:31:24,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:24,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:31:24,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:31:24,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:31:24,990 INFO L87 Difference]: Start difference. First operand 27938 states and 39374 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-23 03:31:27,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:32,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:32,844 INFO L93 Difference]: Finished difference Result 55924 states and 78862 transitions. [2021-11-23 03:31:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:31:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 190 [2021-11-23 03:31:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:32,937 INFO L225 Difference]: With dead ends: 55924 [2021-11-23 03:31:32,937 INFO L226 Difference]: Without dead ends: 28075 [2021-11-23 03:31:32,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:31:32,996 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 186 mSDsluCounter, 6447 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 7101 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:32,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 7101 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1003 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-11-23 03:31:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28075 states. [2021-11-23 03:31:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28075 to 27950. [2021-11-23 03:31:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27950 states, 17878 states have (on average 1.3446134914419958) internal successors, (24039), 18479 states have internal predecessors, (24039), 7544 states have call successors, (7544), 2540 states have call predecessors, (7544), 2527 states have return successors, (7804), 7184 states have call predecessors, (7804), 7538 states have call successors, (7804) [2021-11-23 03:31:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27950 states to 27950 states and 39387 transitions. [2021-11-23 03:31:34,472 INFO L78 Accepts]: Start accepts. Automaton has 27950 states and 39387 transitions. Word has length 190 [2021-11-23 03:31:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:34,474 INFO L470 AbstractCegarLoop]: Abstraction has 27950 states and 39387 transitions. [2021-11-23 03:31:34,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-23 03:31:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 27950 states and 39387 transitions. [2021-11-23 03:31:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-23 03:31:34,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:34,494 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:34,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:31:34,494 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1721678140, now seen corresponding path program 1 times [2021-11-23 03:31:34,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:34,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034177980] [2021-11-23 03:31:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:34,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-23 03:31:34,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:34,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034177980] [2021-11-23 03:31:34,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034177980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:34,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:34,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:34,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044819867] [2021-11-23 03:31:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:34,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:34,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:34,795 INFO L87 Difference]: Start difference. First operand 27950 states and 39387 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-23 03:31:37,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:40,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:44,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:44,760 INFO L93 Difference]: Finished difference Result 68988 states and 97204 transitions. [2021-11-23 03:31:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 209 [2021-11-23 03:31:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:44,883 INFO L225 Difference]: With dead ends: 68988 [2021-11-23 03:31:44,883 INFO L226 Difference]: Without dead ends: 41138 [2021-11-23 03:31:44,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:44,940 INFO L933 BasicCegarLoop]: 1809 mSDtfsCounter, 1311 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 3144 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:44,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 3144 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 434 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 03:31:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41138 states. [2021-11-23 03:31:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41138 to 41001. [2021-11-23 03:31:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41001 states, 26325 states have (on average 1.3458309591642925) internal successors, (35429), 27194 states have internal predecessors, (35429), 10949 states have call successors, (10949), 3745 states have call predecessors, (10949), 3726 states have return successors, (11325), 10435 states have call predecessors, (11325), 10943 states have call successors, (11325) [2021-11-23 03:31:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41001 states to 41001 states and 57703 transitions. [2021-11-23 03:31:46,563 INFO L78 Accepts]: Start accepts. Automaton has 41001 states and 57703 transitions. Word has length 209 [2021-11-23 03:31:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:46,563 INFO L470 AbstractCegarLoop]: Abstraction has 41001 states and 57703 transitions. [2021-11-23 03:31:46,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-23 03:31:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 41001 states and 57703 transitions. [2021-11-23 03:31:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-23 03:31:46,572 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:46,573 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:46,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 03:31:46,573 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1754051292, now seen corresponding path program 1 times [2021-11-23 03:31:46,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:46,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987237708] [2021-11-23 03:31:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:46,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2021-11-23 03:31:47,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987237708] [2021-11-23 03:31:47,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987237708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:47,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:47,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 03:31:47,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682386686] [2021-11-23 03:31:47,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:47,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:31:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:47,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:31:47,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:31:47,378 INFO L87 Difference]: Start difference. First operand 41001 states and 57703 transitions. Second operand has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-23 03:31:51,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:31:55,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:08,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:13,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:15,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:18,022 INFO L93 Difference]: Finished difference Result 59816 states and 87394 transitions. [2021-11-23 03:32:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:32:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) Word has length 205 [2021-11-23 03:32:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:18,216 INFO L225 Difference]: With dead ends: 59816 [2021-11-23 03:32:18,216 INFO L226 Difference]: Without dead ends: 59813 [2021-11-23 03:32:18,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:32:18,233 INFO L933 BasicCegarLoop]: 1952 mSDtfsCounter, 3071 mSDsluCounter, 6675 mSDsCounter, 0 mSdLazyCounter, 9523 mSolverCounterSat, 1934 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 7730 SdHoareTripleChecker+Invalid, 11462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1934 IncrementalHoareTripleChecker+Valid, 9523 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:18,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3378 Valid, 7730 Invalid, 11462 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1934 Valid, 9523 Invalid, 5 Unknown, 0 Unchecked, 28.5s Time] [2021-11-23 03:32:18,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59813 states. [2021-11-23 03:32:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59813 to 45181. [2021-11-23 03:32:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45181 states, 28797 states have (on average 1.3337153175678023) internal successors, (38407), 29846 states have internal predecessors, (38407), 11965 states have call successors, (11965), 4137 states have call predecessors, (11965), 4418 states have return successors, (12971), 11625 states have call predecessors, (12971), 11959 states have call successors, (12971) [2021-11-23 03:32:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45181 states to 45181 states and 63343 transitions. [2021-11-23 03:32:20,519 INFO L78 Accepts]: Start accepts. Automaton has 45181 states and 63343 transitions. Word has length 205 [2021-11-23 03:32:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:20,519 INFO L470 AbstractCegarLoop]: Abstraction has 45181 states and 63343 transitions. [2021-11-23 03:32:20,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-23 03:32:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 45181 states and 63343 transitions. [2021-11-23 03:32:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-23 03:32:20,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:20,535 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:20,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 03:32:20,536 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1068941740, now seen corresponding path program 1 times [2021-11-23 03:32:20,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:20,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411468990] [2021-11-23 03:32:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:20,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 03:32:20,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411468990] [2021-11-23 03:32:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411468990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:20,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:32:20,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:32:20,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579357141] [2021-11-23 03:32:20,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:20,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:32:20,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:32:20,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:32:20,902 INFO L87 Difference]: Start difference. First operand 45181 states and 63343 transitions. Second operand has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 03:32:23,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:28,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:29,016 INFO L93 Difference]: Finished difference Result 90362 states and 126695 transitions. [2021-11-23 03:32:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:32:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 212 [2021-11-23 03:32:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:29,171 INFO L225 Difference]: With dead ends: 90362 [2021-11-23 03:32:29,171 INFO L226 Difference]: Without dead ends: 45230 [2021-11-23 03:32:29,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:32:29,261 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 4 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:29,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4216 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 03:32:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45230 states. [2021-11-23 03:32:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45230 to 45182. [2021-11-23 03:32:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45182 states, 28798 states have (on average 1.3337037294256546) internal successors, (38408), 29847 states have internal predecessors, (38408), 11965 states have call successors, (11965), 4137 states have call predecessors, (11965), 4418 states have return successors, (12971), 11625 states have call predecessors, (12971), 11959 states have call successors, (12971) [2021-11-23 03:32:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45182 states to 45182 states and 63344 transitions. [2021-11-23 03:32:31,345 INFO L78 Accepts]: Start accepts. Automaton has 45182 states and 63344 transitions. Word has length 212 [2021-11-23 03:32:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:31,346 INFO L470 AbstractCegarLoop]: Abstraction has 45182 states and 63344 transitions. [2021-11-23 03:32:31,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 03:32:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 45182 states and 63344 transitions. [2021-11-23 03:32:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-23 03:32:31,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:31,365 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:31,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 03:32:31,366 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:31,366 INFO L85 PathProgramCache]: Analyzing trace with hash -345584215, now seen corresponding path program 1 times [2021-11-23 03:32:31,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:31,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104274141] [2021-11-23 03:32:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:31,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 03:32:31,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104274141] [2021-11-23 03:32:31,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104274141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218008511] [2021-11-23 03:32:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:31,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:31,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:31,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:32:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 5516 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:32:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-23 03:32:33,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:33,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218008511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:33,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:32:33,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-23 03:32:33,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134404188] [2021-11-23 03:32:33,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:32:33,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:34,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:32:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:32:34,000 INFO L87 Difference]: Start difference. First operand 45182 states and 63344 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 03:32:36,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:41,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:32:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:32:42,316 INFO L93 Difference]: Finished difference Result 90323 states and 126622 transitions. [2021-11-23 03:32:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:32:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 213 [2021-11-23 03:32:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:32:42,471 INFO L225 Difference]: With dead ends: 90323 [2021-11-23 03:32:42,471 INFO L226 Difference]: Without dead ends: 45230 [2021-11-23 03:32:42,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:32:42,576 INFO L933 BasicCegarLoop]: 1434 mSDtfsCounter, 59 mSDsluCounter, 4834 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 5674 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:32:42,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 5674 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 817 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 03:32:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45230 states. [2021-11-23 03:32:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45230 to 45172. [2021-11-23 03:32:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45172 states, 28793 states have (on average 1.3336922168582641) internal successors, (38401), 29842 states have internal predecessors, (38401), 11962 states have call successors, (11962), 4135 states have call predecessors, (11962), 4416 states have return successors, (12968), 11622 states have call predecessors, (12968), 11956 states have call successors, (12968) [2021-11-23 03:32:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45172 states to 45172 states and 63331 transitions. [2021-11-23 03:32:44,672 INFO L78 Accepts]: Start accepts. Automaton has 45172 states and 63331 transitions. Word has length 213 [2021-11-23 03:32:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:32:44,673 INFO L470 AbstractCegarLoop]: Abstraction has 45172 states and 63331 transitions. [2021-11-23 03:32:44,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-23 03:32:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 45172 states and 63331 transitions. [2021-11-23 03:32:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-23 03:32:44,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:32:44,696 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:32:44,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:32:44,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:44,910 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:32:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:32:44,911 INFO L85 PathProgramCache]: Analyzing trace with hash 918869884, now seen corresponding path program 1 times [2021-11-23 03:32:44,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:32:44,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441898812] [2021-11-23 03:32:44,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:44,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:32:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-23 03:32:45,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:32:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441898812] [2021-11-23 03:32:45,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441898812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:32:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111844748] [2021-11-23 03:32:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:32:45,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:32:45,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:32:45,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:32:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:32:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:32:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:32:46,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:32:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-23 03:32:47,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:32:47,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111844748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:32:47,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:32:47,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-23 03:32:47,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734833787] [2021-11-23 03:32:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:32:47,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:32:47,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:32:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:32:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:32:47,499 INFO L87 Difference]: Start difference. First operand 45172 states and 63331 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 03:32:50,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:03,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:05,086 INFO L93 Difference]: Finished difference Result 68071 states and 98216 transitions. [2021-11-23 03:33:05,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:33:05,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 216 [2021-11-23 03:33:05,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:05,393 INFO L225 Difference]: With dead ends: 68071 [2021-11-23 03:33:05,394 INFO L226 Difference]: Without dead ends: 68020 [2021-11-23 03:33:05,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:33:05,429 INFO L933 BasicCegarLoop]: 1784 mSDtfsCounter, 1888 mSDsluCounter, 5013 mSDsCounter, 0 mSdLazyCounter, 6704 mSolverCounterSat, 1186 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2103 SdHoareTripleChecker+Valid, 6137 SdHoareTripleChecker+Invalid, 7892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1186 IncrementalHoareTripleChecker+Valid, 6704 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:05,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2103 Valid, 6137 Invalid, 7892 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1186 Valid, 6704 Invalid, 2 Unknown, 0 Unchecked, 15.3s Time] [2021-11-23 03:33:05,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68020 states. [2021-11-23 03:33:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68020 to 57808. [2021-11-23 03:33:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57808 states, 36939 states have (on average 1.3381250169197867) internal successors, (49429), 38270 states have internal predecessors, (49429), 15314 states have call successors, (15314), 5291 states have call predecessors, (15314), 5554 states have return successors, (16684), 14794 states have call predecessors, (16684), 15308 states have call successors, (16684) [2021-11-23 03:33:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57808 states to 57808 states and 81427 transitions. [2021-11-23 03:33:08,338 INFO L78 Accepts]: Start accepts. Automaton has 57808 states and 81427 transitions. Word has length 216 [2021-11-23 03:33:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:08,338 INFO L470 AbstractCegarLoop]: Abstraction has 57808 states and 81427 transitions. [2021-11-23 03:33:08,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-23 03:33:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57808 states and 81427 transitions. [2021-11-23 03:33:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-23 03:33:08,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:08,383 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:08,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:08,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:08,594 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash -569833208, now seen corresponding path program 1 times [2021-11-23 03:33:08,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:08,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328327793] [2021-11-23 03:33:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:08,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2021-11-23 03:33:08,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:08,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328327793] [2021-11-23 03:33:08,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328327793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:08,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:33:08,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:33:08,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754256069] [2021-11-23 03:33:08,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:08,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:33:08,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:33:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:33:08,872 INFO L87 Difference]: Start difference. First operand 57808 states and 81427 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2021-11-23 03:33:11,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:15,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:33:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:16,590 INFO L93 Difference]: Finished difference Result 88031 states and 125495 transitions. [2021-11-23 03:33:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:33:16,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) Word has length 236 [2021-11-23 03:33:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:16,774 INFO L225 Difference]: With dead ends: 88031 [2021-11-23 03:33:16,774 INFO L226 Difference]: Without dead ends: 58400 [2021-11-23 03:33:16,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:33:16,848 INFO L933 BasicCegarLoop]: 1412 mSDtfsCounter, 6 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2817 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:16,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2817 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 03:33:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58400 states. [2021-11-23 03:33:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58400 to 57860. [2021-11-23 03:33:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57860 states, 36991 states have (on average 1.3376496985753292) internal successors, (49481), 38322 states have internal predecessors, (49481), 15314 states have call successors, (15314), 5291 states have call predecessors, (15314), 5554 states have return successors, (16684), 14794 states have call predecessors, (16684), 15308 states have call successors, (16684) [2021-11-23 03:33:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57860 states to 57860 states and 81479 transitions. [2021-11-23 03:33:19,979 INFO L78 Accepts]: Start accepts. Automaton has 57860 states and 81479 transitions. Word has length 236 [2021-11-23 03:33:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:19,980 INFO L470 AbstractCegarLoop]: Abstraction has 57860 states and 81479 transitions. [2021-11-23 03:33:19,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 1 states have call predecessors, (36), 1 states have call successors, (36) [2021-11-23 03:33:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 57860 states and 81479 transitions. [2021-11-23 03:33:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-23 03:33:20,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:20,019 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:20,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 03:33:20,019 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -968869545, now seen corresponding path program 1 times [2021-11-23 03:33:20,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:20,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765830708] [2021-11-23 03:33:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:20,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-11-23 03:33:20,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765830708] [2021-11-23 03:33:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765830708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:33:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039474814] [2021-11-23 03:33:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:20,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:20,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:20,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5e7ccb-20b2-4208-86fe-55f252167038/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:33:21,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:21,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 5906 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:33:21,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2021-11-23 03:33:21,754 INFO L328 TraceCheckSpWp]: Computing backward predicates...