./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7 --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 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:11:32,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:11:32,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:11:32,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:11:32,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:11:32,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:11:32,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:11:32,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:11:32,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:11:32,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:11:32,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:11:32,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:11:32,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:11:32,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:11:32,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:11:32,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:11:32,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:11:32,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:11:32,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:11:32,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:11:32,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:11:32,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:11:32,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:11:32,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:11:32,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:11:32,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:11:32,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:11:32,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:11:32,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:11:32,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:11:32,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:11:32,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:11:32,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:11:32,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:11:32,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:11:32,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:11:32,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:11:32,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:11:32,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:11:32,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:11:32,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:11:32,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:11:32,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:11:32,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:11:32,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:11:32,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:11:32,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:11:32,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:11:32,271 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:11:32,271 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:11:32,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:11:32,272 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:11:32,272 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:11:32,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:11:32,273 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:11:32,273 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:11:32,274 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:11:32,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:11:32,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:11:32,274 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:11:32,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:11:32,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:11:32,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:11:32,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:11:32,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:11:32,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:11:32,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:11:32,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:11:32,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:11:32,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:11:32,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:11:32,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:32,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:11:32,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:11:32,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:11:32,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:11:32,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:11:32,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:11:32,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:11:32,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:11:32,287 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_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d [2021-11-25 20:11:32,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:11:32,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:11:32,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:11:32,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:11:32,595 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:11:32,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2021-11-25 20:11:32,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/data/7cc659102/c9587da525a04924af836442ec684fec/FLAG49a8f2426 [2021-11-25 20:11:33,632 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:11:33,633 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2021-11-25 20:11:33,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/data/7cc659102/c9587da525a04924af836442ec684fec/FLAG49a8f2426 [2021-11-25 20:11:34,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/data/7cc659102/c9587da525a04924af836442ec684fec [2021-11-25 20:11:34,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:11:34,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:11:34,019 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:34,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:11:34,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:11:34,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:34" (1/1) ... [2021-11-25 20:11:34,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f48dc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:34, skipping insertion in model container [2021-11-25 20:11:34,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:34" (1/1) ... [2021-11-25 20:11:34,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:11:34,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:11:36,825 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_b94da41c-29ad-47cb-a86d-7e73ae84636e/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2021-11-25 20:11:36,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:36,983 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:11:37,917 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_b94da41c-29ad-47cb-a86d-7e73ae84636e/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2021-11-25 20:11:37,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:38,097 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:11:38,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38 WrapperNode [2021-11-25 20:11:38,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:38,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:11:38,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:11:38,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:11:38,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,453 INFO L137 Inliner]: procedures = 356, calls = 3806, calls flagged for inlining = 167, calls inlined = 133, statements flattened = 7285 [2021-11-25 20:11:38,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:11:38,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:11:38,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:11:38,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:11:38,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:11:38,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:11:38,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:11:38,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:11:38,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (1/1) ... [2021-11-25 20:11:38,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:38,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:38,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:11:38,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:11:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-11-25 20:11:38,927 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-11-25 20:11:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2021-11-25 20:11:38,927 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2021-11-25 20:11:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-25 20:11:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:11:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:11:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2021-11-25 20:11:38,928 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2021-11-25 20:11:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 20:11:38,928 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 20:11:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-25 20:11:38,928 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-25 20:11:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-25 20:11:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-25 20:11:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure set_signals [2021-11-25 20:11:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure set_signals [2021-11-25 20:11:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure irq_test [2021-11-25 20:11:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_test [2021-11-25 20:11:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_dma_bufs [2021-11-25 20:11:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_dma_bufs [2021-11-25 20:11:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_ioctl [2021-11-25 20:11:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_ioctl [2021-11-25 20:11:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:11:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:11:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure flush_chars [2021-11-25 20:11:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_chars [2021-11-25 20:11:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2021-11-25 20:11:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2021-11-25 20:11:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 20:11:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 20:11:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 20:11:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 20:11:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure tx_stop [2021-11-25 20:11:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_stop [2021-11-25 20:11:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure sca_init [2021-11-25 20:11:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure sca_init [2021-11-25 20:11:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-25 20:11:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-25 20:11:38,932 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-25 20:11:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-25 20:11:38,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:11:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:11:38,932 INFO L130 BoogieDeclarations]: Found specification of procedure chars_in_buffer [2021-11-25 20:11:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure chars_in_buffer [2021-11-25 20:11:38,933 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 20:11:38,933 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 20:11:38,933 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-25 20:11:38,933 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-25 20:11:38,934 INFO L130 BoogieDeclarations]: Found specification of procedure change_params [2021-11-25 20:11:38,935 INFO L138 BoogieDeclarations]: Found implementation of procedure change_params [2021-11-25 20:11:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-11-25 20:11:38,935 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-11-25 20:11:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-25 20:11:38,936 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-25 20:11:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2021-11-25 20:11:38,936 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2021-11-25 20:11:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 20:11:38,936 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 20:11:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure set_break [2021-11-25 20:11:38,937 INFO L138 BoogieDeclarations]: Found implementation of procedure set_break [2021-11-25 20:11:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure tx_start [2021-11-25 20:11:38,937 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_start [2021-11-25 20:11:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:11:38,937 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 20:11:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure startup [2021-11-25 20:11:38,938 INFO L138 BoogieDeclarations]: Found implementation of procedure startup [2021-11-25 20:11:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_frame_bufs [2021-11-25 20:11:38,938 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_frame_bufs [2021-11-25 20:11:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure rx_free_frame_buffers [2021-11-25 20:11:38,938 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_free_frame_buffers [2021-11-25 20:11:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:11:38,938 INFO L130 BoogieDeclarations]: Found specification of procedure wait_until_sent [2021-11-25 20:11:38,939 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_until_sent [2021-11-25 20:11:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-25 20:11:38,939 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-25 20:11:38,939 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 20:11:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 20:11:38,940 INFO L130 BoogieDeclarations]: Found specification of procedure synclinkmp_cleanup [2021-11-25 20:11:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure synclinkmp_cleanup [2021-11-25 20:11:38,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_tty_port [2021-11-25 20:11:38,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_tty_port [2021-11-25 20:11:38,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:11:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure dtr_rts [2021-11-25 20:11:38,941 INFO L138 BoogieDeclarations]: Found implementation of procedure dtr_rts [2021-11-25 20:11:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-25 20:11:38,941 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-25 20:11:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:11:38,941 INFO L130 BoogieDeclarations]: Found specification of procedure set_rate [2021-11-25 20:11:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rate [2021-11-25 20:11:38,942 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-25 20:11:38,942 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-25 20:11:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure ioctl [2021-11-25 20:11:38,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ioctl [2021-11-25 20:11:38,943 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-25 20:11:38,943 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-25 20:11:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 20:11:38,944 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 20:11:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmset [2021-11-25 20:11:38,944 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmset [2021-11-25 20:11:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-25 20:11:38,944 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-25 20:11:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2021-11-25 20:11:38,944 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2021-11-25 20:11:38,944 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 20:11:38,945 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 20:11:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure rx_stop [2021-11-25 20:11:38,945 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_stop [2021-11-25 20:11:38,945 INFO L130 BoogieDeclarations]: Found specification of procedure loopback_test [2021-11-25 20:11:38,945 INFO L138 BoogieDeclarations]: Found implementation of procedure loopback_test [2021-11-25 20:11:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-25 20:11:38,946 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-25 20:11:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_tx_timeout [2021-11-25 20:11:38,949 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_tx_timeout [2021-11-25 20:11:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:11:38,949 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-25 20:11:38,950 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-25 20:11:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 20:11:38,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 20:11:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:11:38,951 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2021-11-25 20:11:38,957 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2021-11-25 20:11:38,957 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hung_up_p [2021-11-25 20:11:38,958 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hung_up_p [2021-11-25 20:11:38,958 INFO L130 BoogieDeclarations]: Found specification of procedure release_resources [2021-11-25 20:11:38,958 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resources [2021-11-25 20:11:38,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:11:38,959 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-25 20:11:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-25 20:11:38,959 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 20:11:38,959 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 20:11:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-11-25 20:11:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-11-25 20:11:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure tx_set_idle [2021-11-25 20:11:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_set_idle [2021-11-25 20:11:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure set_termios [2021-11-25 20:11:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure set_termios [2021-11-25 20:11:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:11:38,960 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:11:38,960 INFO L130 BoogieDeclarations]: Found specification of procedure write_room [2021-11-25 20:11:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure write_room [2021-11-25 20:11:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure enable_loopback [2021-11-25 20:11:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_loopback [2021-11-25 20:11:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure install [2021-11-25 20:11:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure install [2021-11-25 20:11:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_destroy [2021-11-25 20:11:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_destroy [2021-11-25 20:11:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 20:11:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 20:11:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure throttle [2021-11-25 20:11:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure throttle [2021-11-25 20:11:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-25 20:11:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-25 20:11:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:11:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:11:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_fifo [2021-11-25 20:11:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_fifo [2021-11-25 20:11:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_tty_port [2021-11-25 20:11:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_tty_port [2021-11-25 20:11:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:11:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-25 20:11:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-25 20:11:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_dma_buffer [2021-11-25 20:11:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_dma_buffer [2021-11-25 20:11:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure program_hw [2021-11-25 20:11:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure program_hw [2021-11-25 20:11:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure carrier_raised [2021-11-25 20:11:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure carrier_raised [2021-11-25 20:11:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:11:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:11:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure reset_port [2021-11-25 20:11:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_port [2021-11-25 20:11:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:11:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-25 20:11:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-25 20:11:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:11:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-11-25 20:11:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-11-25 20:11:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure register_test [2021-11-25 20:11:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure register_test [2021-11-25 20:11:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2021-11-25 20:11:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2021-11-25 20:11:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:11:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure hangup [2021-11-25 20:11:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure hangup [2021-11-25 20:11:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 20:11:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure get_icount [2021-11-25 20:11:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure get_icount [2021-11-25 20:11:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ops_disconnect_1 [2021-11-25 20:11:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ops_disconnect_1 [2021-11-25 20:11:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure write_control_reg [2021-11-25 20:11:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure write_control_reg [2021-11-25 20:11:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2021-11-25 20:11:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2021-11-25 20:11:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure unthrottle [2021-11-25 20:11:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure unthrottle [2021-11-25 20:11:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure tx_release [2021-11-25 20:11:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_release [2021-11-25 20:11:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-25 20:11:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-25 20:11:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-25 20:11:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-25 20:11:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_mode [2021-11-25 20:11:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_mode [2021-11-25 20:11:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure rx_get_frame [2021-11-25 20:11:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_get_frame [2021-11-25 20:11:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure shutdown [2021-11-25 20:11:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure shutdown [2021-11-25 20:11:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-11-25 20:11:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-11-25 20:11:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure send_xchar [2021-11-25 20:11:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure send_xchar [2021-11-25 20:11:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-25 20:11:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-25 20:11:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmget [2021-11-25 20:11:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmget [2021-11-25 20:11:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2021-11-25 20:11:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2021-11-25 20:11:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg16 [2021-11-25 20:11:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg16 [2021-11-25 20:11:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-25 20:11:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-25 20:11:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure get_signals [2021-11-25 20:11:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure get_signals [2021-11-25 20:11:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 20:11:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 20:11:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:11:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-25 20:11:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-25 20:11:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure rx_start [2021-11-25 20:11:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_start [2021-11-25 20:11:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure trace_block [2021-11-25 20:11:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_block [2021-11-25 20:11:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure sanity_check [2021-11-25 20:11:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure sanity_check [2021-11-25 20:11:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:11:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:11:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure read_status_reg [2021-11-25 20:11:38,972 INFO L138 BoogieDeclarations]: Found implementation of procedure read_status_reg [2021-11-25 20:11:39,954 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:11:39,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:12:11,386 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:12:14,140 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:12:14,140 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:12:14,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:12:14 BoogieIcfgContainer [2021-11-25 20:12:14,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:12:14,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:12:14,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:12:14,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:12:14,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:11:34" (1/3) ... [2021-11-25 20:12:14,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5723ec64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:12:14, skipping insertion in model container [2021-11-25 20:12:14,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:38" (2/3) ... [2021-11-25 20:12:14,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5723ec64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:12:14, skipping insertion in model container [2021-11-25 20:12:14,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:12:14" (3/3) ... [2021-11-25 20:12:14,163 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2021-11-25 20:12:14,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:12:14,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:12:14,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:12:14,255 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 [2021-11-25 20:12:14,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:12:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 2056 states, 1234 states have (on average 1.3695299837925445) internal successors, (1690), 1291 states have internal predecessors, (1690), 710 states have call successors, (710), 110 states have call predecessors, (710), 110 states have return successors, (710), 704 states have call predecessors, (710), 710 states have call successors, (710) [2021-11-25 20:12:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 20:12:14,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:14,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:14,352 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash -926026724, now seen corresponding path program 1 times [2021-11-25 20:12:14,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:14,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751327609] [2021-11-25 20:12:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:14,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:14,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:14,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751327609] [2021-11-25 20:12:14,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751327609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:12:14,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:12:14,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:12:14,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907534470] [2021-11-25 20:12:14,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:12:14,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:12:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:12:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:14,960 INFO L87 Difference]: Start difference. First operand has 2056 states, 1234 states have (on average 1.3695299837925445) internal successors, (1690), 1291 states have internal predecessors, (1690), 710 states have call successors, (710), 110 states have call predecessors, (710), 110 states have return successors, (710), 704 states have call predecessors, (710), 710 states have call successors, (710) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:17,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:19,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:12:20,953 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:27,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:28,782 INFO L93 Difference]: Finished difference Result 6149 states and 9346 transitions. [2021-11-25 20:12:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:12:28,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 20:12:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:28,848 INFO L225 Difference]: With dead ends: 6149 [2021-11-25 20:12:28,849 INFO L226 Difference]: Without dead ends: 4092 [2021-11-25 20:12:28,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:28,876 INFO L933 BasicCegarLoop]: 3730 mSDtfsCounter, 3075 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 6489 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:28,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 6489 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 703 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2021-11-25 20:12:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-11-25 20:12:29,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 4088. [2021-11-25 20:12:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 2458 states have (on average 1.3677786818551667) internal successors, (3362), 2562 states have internal predecessors, (3362), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2021-11-25 20:12:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 6181 transitions. [2021-11-25 20:12:29,306 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 6181 transitions. Word has length 16 [2021-11-25 20:12:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:29,307 INFO L470 AbstractCegarLoop]: Abstraction has 4088 states and 6181 transitions. [2021-11-25 20:12:29,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 6181 transitions. [2021-11-25 20:12:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 20:12:29,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:29,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:29,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:12:29,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1356726083, now seen corresponding path program 1 times [2021-11-25 20:12:29,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:29,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264439760] [2021-11-25 20:12:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:29,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:29,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:29,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264439760] [2021-11-25 20:12:29,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264439760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:12:29,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:12:29,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:12:29,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362499748] [2021-11-25 20:12:29,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:12:29,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:12:29,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:12:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:29,556 INFO L87 Difference]: Start difference. First operand 4088 states and 6181 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:31,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:33,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:12:35,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:37,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:40,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:44,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:12:45,689 INFO L93 Difference]: Finished difference Result 4096 states and 6188 transitions. [2021-11-25 20:12:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:12:45,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 20:12:45,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:45,725 INFO L225 Difference]: With dead ends: 4096 [2021-11-25 20:12:45,725 INFO L226 Difference]: Without dead ends: 4093 [2021-11-25 20:12:45,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:45,731 INFO L933 BasicCegarLoop]: 3730 mSDtfsCounter, 3070 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 6492 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:45,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3073 Valid, 6492 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 703 Invalid, 3 Unknown, 0 Unchecked, 15.9s Time] [2021-11-25 20:12:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4093 states. [2021-11-25 20:12:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4093 to 4089. [2021-11-25 20:12:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 2459 states have (on average 1.3676291175274502) internal successors, (3363), 2563 states have internal predecessors, (3363), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2021-11-25 20:12:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 6182 transitions. [2021-11-25 20:12:45,977 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 6182 transitions. Word has length 17 [2021-11-25 20:12:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:45,978 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 6182 transitions. [2021-11-25 20:12:45,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 6182 transitions. [2021-11-25 20:12:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:12:45,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:45,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:12:45,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:12:45,981 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash -892376065, now seen corresponding path program 1 times [2021-11-25 20:12:45,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:45,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782085100] [2021-11-25 20:12:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:45,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:12:46,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782085100] [2021-11-25 20:12:46,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782085100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:12:46,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:12:46,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:12:46,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151212099] [2021-11-25 20:12:46,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:12:46,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:12:46,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:12:46,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:12:46,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:12:46,148 INFO L87 Difference]: Start difference. First operand 4089 states and 6182 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:12:48,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:50,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:12:51,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:53,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:12:59,584 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 [] [2021-11-25 20:13:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:00,536 INFO L93 Difference]: Finished difference Result 4097 states and 6189 transitions. [2021-11-25 20:13:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 20:13:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:00,567 INFO L225 Difference]: With dead ends: 4097 [2021-11-25 20:13:00,568 INFO L226 Difference]: Without dead ends: 4094 [2021-11-25 20:13:00,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:00,573 INFO L933 BasicCegarLoop]: 3729 mSDtfsCounter, 3067 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3070 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:00,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3070 Valid, 6494 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 702 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2021-11-25 20:13:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-11-25 20:13:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 4090. [2021-11-25 20:13:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4090 states, 2460 states have (on average 1.367479674796748) internal successors, (3364), 2564 states have internal predecessors, (3364), 1411 states have call successors, (1411), 219 states have call predecessors, (1411), 218 states have return successors, (1408), 1393 states have call predecessors, (1408), 1405 states have call successors, (1408) [2021-11-25 20:13:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4090 states to 4090 states and 6183 transitions. [2021-11-25 20:13:00,844 INFO L78 Accepts]: Start accepts. Automaton has 4090 states and 6183 transitions. Word has length 18 [2021-11-25 20:13:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:00,845 INFO L470 AbstractCegarLoop]: Abstraction has 4090 states and 6183 transitions. [2021-11-25 20:13:00,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4090 states and 6183 transitions. [2021-11-25 20:13:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:13:00,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:00,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:00,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:13:00,850 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1895061050, now seen corresponding path program 1 times [2021-11-25 20:13:00,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:00,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958276412] [2021-11-25 20:13:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:00,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:01,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958276412] [2021-11-25 20:13:01,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958276412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:01,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:01,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:13:01,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937290231] [2021-11-25 20:13:01,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:01,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:01,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:01,231 INFO L87 Difference]: Start difference. First operand 4090 states and 6183 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:03,378 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 [] [2021-11-25 20:13:05,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:12,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:14,026 INFO L93 Difference]: Finished difference Result 6245 states and 9401 transitions. [2021-11-25 20:13:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:14,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 20:13:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:14,080 INFO L225 Difference]: With dead ends: 6245 [2021-11-25 20:13:14,080 INFO L226 Difference]: Without dead ends: 6234 [2021-11-25 20:13:14,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:14,088 INFO L933 BasicCegarLoop]: 3653 mSDtfsCounter, 2997 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 6400 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:14,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2999 Valid, 6400 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 683 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-11-25 20:13:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-11-25 20:13:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 6229. [2021-11-25 20:13:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6229 states, 3746 states have (on average 1.3646556326748531) internal successors, (5112), 3905 states have internal predecessors, (5112), 2130 states have call successors, (2130), 354 states have call predecessors, (2130), 352 states have return successors, (2139), 2101 states have call predecessors, (2139), 2124 states have call successors, (2139) [2021-11-25 20:13:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6229 states to 6229 states and 9381 transitions. [2021-11-25 20:13:14,470 INFO L78 Accepts]: Start accepts. Automaton has 6229 states and 9381 transitions. Word has length 19 [2021-11-25 20:13:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:14,470 INFO L470 AbstractCegarLoop]: Abstraction has 6229 states and 9381 transitions. [2021-11-25 20:13:14,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:13:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6229 states and 9381 transitions. [2021-11-25 20:13:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:13:14,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:14,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:14,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:13:14,476 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1444519304, now seen corresponding path program 1 times [2021-11-25 20:13:14,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:14,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311675254] [2021-11-25 20:13:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:14,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:15,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:15,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311675254] [2021-11-25 20:13:15,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311675254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:15,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:15,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:13:15,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599330427] [2021-11-25 20:13:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:15,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:13:15,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:13:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:13:15,322 INFO L87 Difference]: Start difference. First operand 6229 states and 9381 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:13:17,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:19,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:24,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:27,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:29,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:31,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:36,296 INFO L93 Difference]: Finished difference Result 11664 states and 17821 transitions. [2021-11-25 20:13:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:13:36,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-25 20:13:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:36,392 INFO L225 Difference]: With dead ends: 11664 [2021-11-25 20:13:36,393 INFO L226 Difference]: Without dead ends: 11653 [2021-11-25 20:13:36,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:13:36,403 INFO L933 BasicCegarLoop]: 4691 mSDtfsCounter, 4044 mSDsluCounter, 7539 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 232 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4047 SdHoareTripleChecker+Valid, 11517 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:36,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4047 Valid, 11517 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1419 Invalid, 4 Unknown, 0 Unchecked, 20.6s Time] [2021-11-25 20:13:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11653 states. [2021-11-25 20:13:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11653 to 10221. [2021-11-25 20:13:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10221 states, 6154 states have (on average 1.367078323041924) internal successors, (8413), 6418 states have internal predecessors, (8413), 3500 states have call successors, (3500), 569 states have call predecessors, (3500), 566 states have return successors, (3524), 3450 states have call predecessors, (3524), 3494 states have call successors, (3524) [2021-11-25 20:13:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10221 states to 10221 states and 15437 transitions. [2021-11-25 20:13:37,159 INFO L78 Accepts]: Start accepts. Automaton has 10221 states and 15437 transitions. Word has length 26 [2021-11-25 20:13:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:37,159 INFO L470 AbstractCegarLoop]: Abstraction has 10221 states and 15437 transitions. [2021-11-25 20:13:37,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:13:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10221 states and 15437 transitions. [2021-11-25 20:13:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 20:13:37,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:37,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:37,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:13:37,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1367215745, now seen corresponding path program 1 times [2021-11-25 20:13:37,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836248451] [2021-11-25 20:13:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:37,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:38,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836248451] [2021-11-25 20:13:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836248451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:38,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:13:38,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378225811] [2021-11-25 20:13:38,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:38,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:38,184 INFO L87 Difference]: Start difference. First operand 10221 states and 15437 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:13:40,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:42,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:43,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:47,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:13:52,195 INFO L93 Difference]: Finished difference Result 14358 states and 21679 transitions. [2021-11-25 20:13:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:13:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-11-25 20:13:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:13:52,283 INFO L225 Difference]: With dead ends: 14358 [2021-11-25 20:13:52,283 INFO L226 Difference]: Without dead ends: 14355 [2021-11-25 20:13:52,299 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 [2021-11-25 20:13:52,300 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3069 mSDsluCounter, 3087 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 6580 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:13:52,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 6580 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2021-11-25 20:13:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-11-25 20:13:53,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 14351. [2021-11-25 20:13:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14351 states, 8644 states have (on average 1.3666126793151319) internal successors, (11813), 9015 states have internal predecessors, (11813), 4910 states have call successors, (4910), 800 states have call predecessors, (4910), 796 states have return successors, (4949), 4842 states have call predecessors, (4949), 4904 states have call successors, (4949) [2021-11-25 20:13:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14351 states to 14351 states and 21672 transitions. [2021-11-25 20:13:53,305 INFO L78 Accepts]: Start accepts. Automaton has 14351 states and 21672 transitions. Word has length 38 [2021-11-25 20:13:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:13:53,305 INFO L470 AbstractCegarLoop]: Abstraction has 14351 states and 21672 transitions. [2021-11-25 20:13:53,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:13:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14351 states and 21672 transitions. [2021-11-25 20:13:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 20:13:53,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:13:53,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:13:53,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:13:53,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:13:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:13:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash 564768320, now seen corresponding path program 1 times [2021-11-25 20:13:53,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:13:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246890956] [2021-11-25 20:13:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:13:53,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:13:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:13:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:13:54,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:13:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246890956] [2021-11-25 20:13:54,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246890956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:13:54,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:13:54,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:13:54,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488711561] [2021-11-25 20:13:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:13:54,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:13:54,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:13:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:13:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:13:54,091 INFO L87 Difference]: Start difference. First operand 14351 states and 21672 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:13:56,283 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:13:58,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:13:59,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:00,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:04,043 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 [] [2021-11-25 20:14:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:07,319 INFO L93 Difference]: Finished difference Result 14360 states and 21681 transitions. [2021-11-25 20:14:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:14:07,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-11-25 20:14:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:07,395 INFO L225 Difference]: With dead ends: 14360 [2021-11-25 20:14:07,395 INFO L226 Difference]: Without dead ends: 14357 [2021-11-25 20:14:07,409 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 [2021-11-25 20:14:07,410 INFO L933 BasicCegarLoop]: 3821 mSDtfsCounter, 3066 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3069 SdHoareTripleChecker+Valid, 6583 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:07,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3069 Valid, 6583 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 717 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-11-25 20:14:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14357 states. [2021-11-25 20:14:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14357 to 14353. [2021-11-25 20:14:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 8646 states have (on average 1.366527874161462) internal successors, (11815), 9017 states have internal predecessors, (11815), 4910 states have call successors, (4910), 800 states have call predecessors, (4910), 796 states have return successors, (4949), 4842 states have call predecessors, (4949), 4904 states have call successors, (4949) [2021-11-25 20:14:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 21674 transitions. [2021-11-25 20:14:08,366 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 21674 transitions. Word has length 39 [2021-11-25 20:14:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:08,366 INFO L470 AbstractCegarLoop]: Abstraction has 14353 states and 21674 transitions. [2021-11-25 20:14:08,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:14:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 21674 transitions. [2021-11-25 20:14:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 20:14:08,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:08,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:14:08,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:14:08,378 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash 326737058, now seen corresponding path program 1 times [2021-11-25 20:14:08,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505949655] [2021-11-25 20:14:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:08,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:09,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:09,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505949655] [2021-11-25 20:14:09,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505949655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:14:09,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:14:09,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:14:09,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796353490] [2021-11-25 20:14:09,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:14:09,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:14:09,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:09,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:14:09,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:14:09,188 INFO L87 Difference]: Start difference. First operand 14353 states and 21674 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:14:11,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:12,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:14:17,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:20,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:14:23,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:24,800 INFO L93 Difference]: Finished difference Result 14582 states and 21994 transitions. [2021-11-25 20:14:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:14:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-25 20:14:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:24,884 INFO L225 Difference]: With dead ends: 14582 [2021-11-25 20:14:24,884 INFO L226 Difference]: Without dead ends: 14573 [2021-11-25 20:14:24,895 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 [2021-11-25 20:14:24,896 INFO L933 BasicCegarLoop]: 3684 mSDtfsCounter, 3066 mSDsluCounter, 3094 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 6449 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:24,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3066 Valid, 6449 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 701 Invalid, 3 Unknown, 0 Unchecked, 15.2s Time] [2021-11-25 20:14:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14573 states. [2021-11-25 20:14:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14573 to 14569. [2021-11-25 20:14:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14569 states, 8742 states have (on average 1.3635323724548158) internal successors, (11920), 9121 states have internal predecessors, (11920), 5010 states have call successors, (5010), 819 states have call predecessors, (5010), 816 states have return successors, (5049), 4940 states have call predecessors, (5049), 5004 states have call successors, (5049) [2021-11-25 20:14:25,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14569 states to 14569 states and 21979 transitions. [2021-11-25 20:14:25,736 INFO L78 Accepts]: Start accepts. Automaton has 14569 states and 21979 transitions. Word has length 40 [2021-11-25 20:14:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:25,737 INFO L470 AbstractCegarLoop]: Abstraction has 14569 states and 21979 transitions. [2021-11-25 20:14:25,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:14:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 14569 states and 21979 transitions. [2021-11-25 20:14:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 20:14:25,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:25,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:14:25,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:14:25,748 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1537707395, now seen corresponding path program 1 times [2021-11-25 20:14:25,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:25,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328197701] [2021-11-25 20:14:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:25,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:26,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:26,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328197701] [2021-11-25 20:14:26,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328197701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:14:26,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:14:26,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:14:26,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298818219] [2021-11-25 20:14:26,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:14:26,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:14:26,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:14:26,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:14:26,465 INFO L87 Difference]: Start difference. First operand 14569 states and 21979 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:14:28,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:30,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:14:32,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:36,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:38,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:40,213 INFO L93 Difference]: Finished difference Result 16852 states and 25364 transitions. [2021-11-25 20:14:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:14:40,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-11-25 20:14:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:40,309 INFO L225 Difference]: With dead ends: 16852 [2021-11-25 20:14:40,309 INFO L226 Difference]: Without dead ends: 16841 [2021-11-25 20:14:40,323 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 [2021-11-25 20:14:40,324 INFO L933 BasicCegarLoop]: 3842 mSDtfsCounter, 2993 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 6589 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:40,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2995 Valid, 6589 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 722 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-11-25 20:14:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16841 states. [2021-11-25 20:14:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16841 to 16815. [2021-11-25 20:14:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16815 states, 10089 states have (on average 1.3620775101595797) internal successors, (13742), 10522 states have internal predecessors, (13742), 5759 states have call successors, (5759), 968 states have call predecessors, (5759), 966 states have return successors, (5810), 5686 states have call predecessors, (5810), 5753 states have call successors, (5810) [2021-11-25 20:14:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16815 states to 16815 states and 25311 transitions. [2021-11-25 20:14:41,461 INFO L78 Accepts]: Start accepts. Automaton has 16815 states and 25311 transitions. Word has length 41 [2021-11-25 20:14:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:41,462 INFO L470 AbstractCegarLoop]: Abstraction has 16815 states and 25311 transitions. [2021-11-25 20:14:41,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 20:14:41,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16815 states and 25311 transitions. [2021-11-25 20:14:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:14:41,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:41,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:14:41,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:14:41,477 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1516594460, now seen corresponding path program 1 times [2021-11-25 20:14:41,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:41,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394478607] [2021-11-25 20:14:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:41,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:41,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:41,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394478607] [2021-11-25 20:14:41,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394478607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:14:41,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:14:41,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:14:41,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753950984] [2021-11-25 20:14:41,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:14:41,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:14:41,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:14:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:14:41,630 INFO L87 Difference]: Start difference. First operand 16815 states and 25311 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:14:43,827 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 [] [2021-11-25 20:14:46,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:14:47,898 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:50,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:55,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:14:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:14:56,767 INFO L93 Difference]: Finished difference Result 42149 states and 63086 transitions. [2021-11-25 20:14:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:14:56,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-11-25 20:14:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:14:56,906 INFO L225 Difference]: With dead ends: 42149 [2021-11-25 20:14:56,907 INFO L226 Difference]: Without dead ends: 25335 [2021-11-25 20:14:57,037 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 [2021-11-25 20:14:57,038 INFO L933 BasicCegarLoop]: 3573 mSDtfsCounter, 1563 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 6065 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:14:57,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 6065 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1007 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2021-11-25 20:14:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-11-25 20:14:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 23178. [2021-11-25 20:14:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23178 states, 13791 states have (on average 1.351243564643608) internal successors, (18635), 14359 states have internal predecessors, (18635), 7964 states have call successors, (7964), 1424 states have call predecessors, (7964), 1422 states have return successors, (8021), 7864 states have call predecessors, (8021), 7958 states have call successors, (8021) [2021-11-25 20:14:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23178 states to 23178 states and 34620 transitions. [2021-11-25 20:14:58,645 INFO L78 Accepts]: Start accepts. Automaton has 23178 states and 34620 transitions. Word has length 49 [2021-11-25 20:14:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:14:58,646 INFO L470 AbstractCegarLoop]: Abstraction has 23178 states and 34620 transitions. [2021-11-25 20:14:58,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:14:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 23178 states and 34620 transitions. [2021-11-25 20:14:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 20:14:58,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:14:58,671 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:14:58,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:14:58,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:14:58,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:14:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash 125106314, now seen corresponding path program 1 times [2021-11-25 20:14:58,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:14:58,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82377135] [2021-11-25 20:14:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:14:58,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:14:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:14:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:14:58,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:14:58,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82377135] [2021-11-25 20:14:58,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82377135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:14:58,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:14:58,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:14:58,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315076829] [2021-11-25 20:14:58,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:14:58,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:14:58,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:58,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:14:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:14:58,856 INFO L87 Difference]: Start difference. First operand 23178 states and 34620 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:15:01,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:03,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:15:06,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:14,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:16,815 INFO L93 Difference]: Finished difference Result 60101 states and 89920 transitions. [2021-11-25 20:15:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:15:16,815 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-11-25 20:15:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:16,971 INFO L225 Difference]: With dead ends: 60101 [2021-11-25 20:15:16,972 INFO L226 Difference]: Without dead ends: 36924 [2021-11-25 20:15:17,079 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 [2021-11-25 20:15:17,080 INFO L933 BasicCegarLoop]: 4221 mSDtfsCounter, 2523 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 127 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2526 SdHoareTripleChecker+Valid, 6679 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:17,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2526 Valid, 6679 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1196 Invalid, 3 Unknown, 0 Unchecked, 16.9s Time] [2021-11-25 20:15:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-11-25 20:15:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 36887. [2021-11-25 20:15:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36887 states, 22155 states have (on average 1.3350485217783796) internal successors, (29578), 23088 states have internal predecessors, (29578), 12425 states have call successors, (12425), 2310 states have call predecessors, (12425), 2306 states have return successors, (12502), 12256 states have call predecessors, (12502), 12419 states have call successors, (12502) [2021-11-25 20:15:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36887 states to 36887 states and 54505 transitions. [2021-11-25 20:15:19,196 INFO L78 Accepts]: Start accepts. Automaton has 36887 states and 54505 transitions. Word has length 63 [2021-11-25 20:15:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:19,197 INFO L470 AbstractCegarLoop]: Abstraction has 36887 states and 54505 transitions. [2021-11-25 20:15:19,197 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 20:15:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 36887 states and 54505 transitions. [2021-11-25 20:15:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:15:19,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:19,221 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:15:19,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:15:19,221 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:19,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2012085978, now seen corresponding path program 1 times [2021-11-25 20:15:19,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:19,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311187615] [2021-11-25 20:15:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:19,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:15:19,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:19,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311187615] [2021-11-25 20:15:19,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311187615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:19,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:15:19,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:15:19,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230268182] [2021-11-25 20:15:19,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:19,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:15:19,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:15:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:15:19,449 INFO L87 Difference]: Start difference. First operand 36887 states and 54505 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:15:21,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:24,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:15:25,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:26,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:30,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:33,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:39,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:42,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:45,602 INFO L93 Difference]: Finished difference Result 73268 states and 108209 transitions. [2021-11-25 20:15:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:15:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 61 [2021-11-25 20:15:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:45,973 INFO L225 Difference]: With dead ends: 73268 [2021-11-25 20:15:45,973 INFO L226 Difference]: Without dead ends: 36382 [2021-11-25 20:15:46,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:15:46,105 INFO L933 BasicCegarLoop]: 3693 mSDtfsCounter, 2641 mSDsluCounter, 15319 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2648 SdHoareTripleChecker+Valid, 17544 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:46,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2648 Valid, 17544 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1931 Invalid, 3 Unknown, 0 Unchecked, 24.8s Time] [2021-11-25 20:15:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36382 states. [2021-11-25 20:15:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36382 to 36379. [2021-11-25 20:15:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36379 states, 21864 states have (on average 1.3337449688986462) internal successors, (29161), 22779 states have internal predecessors, (29161), 12219 states have call successors, (12219), 2299 states have call predecessors, (12219), 2295 states have return successors, (12294), 12056 states have call predecessors, (12294), 12213 states have call successors, (12294) [2021-11-25 20:15:47,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36379 states to 36379 states and 53674 transitions. [2021-11-25 20:15:48,000 INFO L78 Accepts]: Start accepts. Automaton has 36379 states and 53674 transitions. Word has length 61 [2021-11-25 20:15:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:48,000 INFO L470 AbstractCegarLoop]: Abstraction has 36379 states and 53674 transitions. [2021-11-25 20:15:48,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-25 20:15:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36379 states and 53674 transitions. [2021-11-25 20:15:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:15:48,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:48,019 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:15:48,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:15:48,020 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash 502508152, now seen corresponding path program 1 times [2021-11-25 20:15:48,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342716879] [2021-11-25 20:15:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:48,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 20:15:48,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342716879] [2021-11-25 20:15:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342716879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:48,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:15:48,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:15:48,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526265396] [2021-11-25 20:15:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:48,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:15:48,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:15:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:15:48,516 INFO L87 Difference]: Start difference. First operand 36379 states and 53674 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, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 20:15:50,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:15:52,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:15:55,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:00,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:02,439 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 [] [2021-11-25 20:16:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:03,956 INFO L93 Difference]: Finished difference Result 36985 states and 54412 transitions. [2021-11-25 20:16:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:16:03,957 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, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 71 [2021-11-25 20:16:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:04,121 INFO L225 Difference]: With dead ends: 36985 [2021-11-25 20:16:04,121 INFO L226 Difference]: Without dead ends: 36982 [2021-11-25 20:16:04,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:16:04,145 INFO L933 BasicCegarLoop]: 2904 mSDtfsCounter, 279 mSDsluCounter, 3013 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 5595 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:04,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 5595 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 685 Invalid, 4 Unknown, 0 Unchecked, 14.7s Time] [2021-11-25 20:16:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36982 states. [2021-11-25 20:16:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36982 to 36982. [2021-11-25 20:16:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36982 states, 22184 states have (on average 1.3309141723764875) internal successors, (29525), 23110 states have internal predecessors, (29525), 12400 states have call successors, (12400), 2401 states have call predecessors, (12400), 2397 states have return successors, (12477), 12238 states have call predecessors, (12477), 12395 states have call successors, (12477) [2021-11-25 20:16:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36982 states to 36982 states and 54402 transitions. [2021-11-25 20:16:06,030 INFO L78 Accepts]: Start accepts. Automaton has 36982 states and 54402 transitions. Word has length 71 [2021-11-25 20:16:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:06,030 INFO L470 AbstractCegarLoop]: Abstraction has 36982 states and 54402 transitions. [2021-11-25 20:16:06,030 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, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 20:16:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 36982 states and 54402 transitions. [2021-11-25 20:16:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 20:16:06,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:06,076 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:16:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:16:06,077 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1333058455, now seen corresponding path program 1 times [2021-11-25 20:16:06,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:06,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619161789] [2021-11-25 20:16:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:06,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:16:06,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:06,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619161789] [2021-11-25 20:16:06,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619161789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:06,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:16:06,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:16:06,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903846266] [2021-11-25 20:16:06,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:06,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:16:06,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:16:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:16:06,783 INFO L87 Difference]: Start difference. First operand 36982 states and 54402 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:16:08,925 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 [] [2021-11-25 20:16:11,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:16:15,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:21,971 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 [] [2021-11-25 20:16:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:24,070 INFO L93 Difference]: Finished difference Result 102044 states and 149658 transitions. [2021-11-25 20:16:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:16:24,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 96 [2021-11-25 20:16:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:24,351 INFO L225 Difference]: With dead ends: 102044 [2021-11-25 20:16:24,351 INFO L226 Difference]: Without dead ends: 65063 [2021-11-25 20:16:24,483 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 [2021-11-25 20:16:24,484 INFO L933 BasicCegarLoop]: 4752 mSDtfsCounter, 2524 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 7516 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:24,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2527 Valid, 7516 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 832 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2021-11-25 20:16:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65063 states. [2021-11-25 20:16:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65063 to 65027. [2021-11-25 20:16:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65027 states, 38873 states have (on average 1.3264991124945336) internal successors, (51565), 40636 states have internal predecessors, (51565), 21733 states have call successors, (21733), 4428 states have call predecessors, (21733), 4420 states have return successors, (21894), 21410 states have call predecessors, (21894), 21728 states have call successors, (21894) [2021-11-25 20:16:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65027 states to 65027 states and 95192 transitions. [2021-11-25 20:16:27,773 INFO L78 Accepts]: Start accepts. Automaton has 65027 states and 95192 transitions. Word has length 96 [2021-11-25 20:16:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:27,773 INFO L470 AbstractCegarLoop]: Abstraction has 65027 states and 95192 transitions. [2021-11-25 20:16:27,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:16:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 65027 states and 95192 transitions. [2021-11-25 20:16:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-25 20:16:27,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:27,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:27,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:16:27,827 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1790729454, now seen corresponding path program 1 times [2021-11-25 20:16:27,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:27,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825362291] [2021-11-25 20:16:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:27,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:16:28,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825362291] [2021-11-25 20:16:28,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825362291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:28,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:16:28,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:16:28,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084901319] [2021-11-25 20:16:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:28,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:16:28,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:16:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:16:28,570 INFO L87 Difference]: Start difference. First operand 65027 states and 95192 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:16:30,736 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 [] [2021-11-25 20:16:32,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:16:36,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:38,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:42,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:16:44,393 INFO L93 Difference]: Finished difference Result 131065 states and 191967 transitions. [2021-11-25 20:16:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:16:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 107 [2021-11-25 20:16:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:16:44,868 INFO L225 Difference]: With dead ends: 131065 [2021-11-25 20:16:44,868 INFO L226 Difference]: Without dead ends: 66039 [2021-11-25 20:16:45,018 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 [2021-11-25 20:16:45,019 INFO L933 BasicCegarLoop]: 2777 mSDtfsCounter, 35 mSDsluCounter, 3075 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5533 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:16:45,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 5533 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 673 Invalid, 3 Unknown, 0 Unchecked, 13.6s Time] [2021-11-25 20:16:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66039 states. [2021-11-25 20:16:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66039 to 65071. [2021-11-25 20:16:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65071 states, 38917 states have (on average 1.3261299689081891) internal successors, (51609), 40680 states have internal predecessors, (51609), 21733 states have call successors, (21733), 4428 states have call predecessors, (21733), 4420 states have return successors, (21894), 21410 states have call predecessors, (21894), 21728 states have call successors, (21894) [2021-11-25 20:16:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65071 states to 65071 states and 95236 transitions. [2021-11-25 20:16:48,456 INFO L78 Accepts]: Start accepts. Automaton has 65071 states and 95236 transitions. Word has length 107 [2021-11-25 20:16:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:16:48,456 INFO L470 AbstractCegarLoop]: Abstraction has 65071 states and 95236 transitions. [2021-11-25 20:16:48,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 20:16:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 65071 states and 95236 transitions. [2021-11-25 20:16:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 20:16:48,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:16:48,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:16:48,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:16:48,515 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:16:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:16:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1442527448, now seen corresponding path program 1 times [2021-11-25 20:16:48,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:16:48,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010769896] [2021-11-25 20:16:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:48,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:16:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:16:49,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:16:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010769896] [2021-11-25 20:16:49,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010769896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:16:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894526552] [2021-11-25 20:16:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:16:49,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:16:49,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:16:49,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:16:49,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:16:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:16:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 8280 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:16:52,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:16:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:16:53,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:16:53,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894526552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:16:53,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:16:53,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 20:16:53,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13049920] [2021-11-25 20:16:53,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:16:53,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:16:53,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:16:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:16:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:16:53,486 INFO L87 Difference]: Start difference. First operand 65071 states and 95236 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:16:55,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:16:57,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:16:59,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:04,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:06,837 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 [] [2021-11-25 20:17:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:09,479 INFO L93 Difference]: Finished difference Result 96229 states and 141001 transitions. [2021-11-25 20:17:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 144 [2021-11-25 20:17:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:09,846 INFO L225 Difference]: With dead ends: 96229 [2021-11-25 20:17:09,846 INFO L226 Difference]: Without dead ends: 96226 [2021-11-25 20:17:09,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:09,886 INFO L933 BasicCegarLoop]: 3929 mSDtfsCounter, 2974 mSDsluCounter, 3085 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 6686 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:09,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2977 Valid, 6686 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 729 Invalid, 3 Unknown, 0 Unchecked, 14.0s Time] [2021-11-25 20:17:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96226 states. [2021-11-25 20:17:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96226 to 90003. [2021-11-25 20:17:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90003 states, 53854 states have (on average 1.3273851524492146) internal successors, (71485), 56294 states have internal predecessors, (71485), 30089 states have call successors, (30089), 6073 states have call predecessors, (30089), 6059 states have return successors, (30314), 29627 states have call predecessors, (30314), 30084 states have call successors, (30314) [2021-11-25 20:17:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90003 states to 90003 states and 131888 transitions. [2021-11-25 20:17:14,529 INFO L78 Accepts]: Start accepts. Automaton has 90003 states and 131888 transitions. Word has length 144 [2021-11-25 20:17:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:14,530 INFO L470 AbstractCegarLoop]: Abstraction has 90003 states and 131888 transitions. [2021-11-25 20:17:14,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:17:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 90003 states and 131888 transitions. [2021-11-25 20:17:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-25 20:17:14,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:14,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:14,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:17:14,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:17:14,806 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:14,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1767461383, now seen corresponding path program 1 times [2021-11-25 20:17:14,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:14,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564191801] [2021-11-25 20:17:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:14,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:17:15,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564191801] [2021-11-25 20:17:15,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564191801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646810002] [2021-11-25 20:17:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:15,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:15,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:15,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:17:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 8282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:17:19,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:19,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646810002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:19,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:19,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 20:17:19,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609793774] [2021-11-25 20:17:19,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:19,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:19,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:19,559 INFO L87 Difference]: Start difference. First operand 90003 states and 131888 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:17:21,656 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 [] [2021-11-25 20:17:23,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:17:31,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:34,220 INFO L93 Difference]: Finished difference Result 90011 states and 131896 transitions. [2021-11-25 20:17:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:17:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 145 [2021-11-25 20:17:34,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:34,555 INFO L225 Difference]: With dead ends: 90011 [2021-11-25 20:17:34,556 INFO L226 Difference]: Without dead ends: 90008 [2021-11-25 20:17:34,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:34,590 INFO L933 BasicCegarLoop]: 3944 mSDtfsCounter, 2971 mSDsluCounter, 3088 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2974 SdHoareTripleChecker+Valid, 6704 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:34,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2974 Valid, 6704 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 735 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-11-25 20:17:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90008 states. [2021-11-25 20:17:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90008 to 90005. [2021-11-25 20:17:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90005 states, 53856 states have (on average 1.3273729946524064) internal successors, (71487), 56296 states have internal predecessors, (71487), 30089 states have call successors, (30089), 6073 states have call predecessors, (30089), 6059 states have return successors, (30314), 29627 states have call predecessors, (30314), 30084 states have call successors, (30314) [2021-11-25 20:17:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90005 states to 90005 states and 131890 transitions. [2021-11-25 20:17:39,392 INFO L78 Accepts]: Start accepts. Automaton has 90005 states and 131890 transitions. Word has length 145 [2021-11-25 20:17:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 90005 states and 131890 transitions. [2021-11-25 20:17:39,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:17:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 90005 states and 131890 transitions. [2021-11-25 20:17:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 20:17:39,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:39,453 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:17:39,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:39,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:17:39,654 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:39,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1044483653, now seen corresponding path program 1 times [2021-11-25 20:17:39,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:39,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582100125] [2021-11-25 20:17:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:39,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:40,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:17:40,207 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582100125] [2021-11-25 20:17:40,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582100125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476758706] [2021-11-25 20:17:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:40,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:40,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:40,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:17:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:44,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 8284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:17:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:17:44,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:17:44,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476758706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:44,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:17:44,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 20:17:44,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85487633] [2021-11-25 20:17:44,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:44,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:17:44,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:17:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:17:44,616 INFO L87 Difference]: Start difference. First operand 90005 states and 131890 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:17:46,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:48,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:17:51,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:17:57,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:18:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:00,071 INFO L93 Difference]: Finished difference Result 90013 states and 131897 transitions. [2021-11-25 20:18:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:00,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 146 [2021-11-25 20:18:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:00,406 INFO L225 Difference]: With dead ends: 90013 [2021-11-25 20:18:00,406 INFO L226 Difference]: Without dead ends: 89997 [2021-11-25 20:18:00,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:18:00,444 INFO L933 BasicCegarLoop]: 3929 mSDtfsCounter, 2962 mSDsluCounter, 3090 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:00,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 6692 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 727 Invalid, 4 Unknown, 0 Unchecked, 13.5s Time] [2021-11-25 20:18:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89997 states. [2021-11-25 20:18:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89997 to 89994. [2021-11-25 20:18:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89994 states, 53853 states have (on average 1.327224110077433) internal successors, (71475), 56286 states have internal predecessors, (71475), 30081 states have call successors, (30081), 6073 states have call predecessors, (30081), 6059 states have return successors, (30306), 29626 states have call predecessors, (30306), 30076 states have call successors, (30306) [2021-11-25 20:18:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89994 states to 89994 states and 131862 transitions. [2021-11-25 20:18:05,146 INFO L78 Accepts]: Start accepts. Automaton has 89994 states and 131862 transitions. Word has length 146 [2021-11-25 20:18:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:05,147 INFO L470 AbstractCegarLoop]: Abstraction has 89994 states and 131862 transitions. [2021-11-25 20:18:05,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:18:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 89994 states and 131862 transitions. [2021-11-25 20:18:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:18:05,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:05,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:05,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:05,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:18:05,403 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:05,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1979538314, now seen corresponding path program 1 times [2021-11-25 20:18:05,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:05,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751408717] [2021-11-25 20:18:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:05,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:18:05,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:05,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751408717] [2021-11-25 20:18:05,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751408717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:05,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572663352] [2021-11-25 20:18:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:05,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:05,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:05,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:05,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:18:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 8286 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:18:09,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-25 20:18:10,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:10,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572663352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:10,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:10,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 20:18:10,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065877950] [2021-11-25 20:18:10,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:10,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:18:10,406 INFO L87 Difference]: Start difference. First operand 89994 states and 131862 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:18:12,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:18:14,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:18:16,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:18:23,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:18:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:26,279 INFO L93 Difference]: Finished difference Result 104788 states and 153777 transitions. [2021-11-25 20:18:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:18:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 147 [2021-11-25 20:18:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:26,660 INFO L225 Difference]: With dead ends: 104788 [2021-11-25 20:18:26,660 INFO L226 Difference]: Without dead ends: 104770 [2021-11-25 20:18:26,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:18:26,706 INFO L933 BasicCegarLoop]: 3926 mSDtfsCounter, 2900 mSDsluCounter, 3069 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2902 SdHoareTripleChecker+Valid, 6672 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:26,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2902 Valid, 6672 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 729 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2021-11-25 20:18:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104770 states. [2021-11-25 20:18:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104770 to 104612. [2021-11-25 20:18:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104612 states, 62717 states have (on average 1.3288422596744105) internal successors, (83341), 65527 states have internal predecessors, (83341), 34922 states have call successors, (34922), 6980 states have call predecessors, (34922), 6972 states have return successors, (35205), 34428 states have call predecessors, (35205), 34917 states have call successors, (35205) [2021-11-25 20:18:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104612 states to 104612 states and 153468 transitions. [2021-11-25 20:18:32,332 INFO L78 Accepts]: Start accepts. Automaton has 104612 states and 153468 transitions. Word has length 147 [2021-11-25 20:18:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:32,333 INFO L470 AbstractCegarLoop]: Abstraction has 104612 states and 153468 transitions. [2021-11-25 20:18:32,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 20:18:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 104612 states and 153468 transitions. [2021-11-25 20:18:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 20:18:32,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:32,393 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:32,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:32,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:32,594 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1413751364, now seen corresponding path program 1 times [2021-11-25 20:18:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:32,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207065574] [2021-11-25 20:18:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:32,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 20:18:34,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207065574] [2021-11-25 20:18:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207065574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376847788] [2021-11-25 20:18:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:34,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:34,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:34,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b94da41c-29ad-47cb-a86d-7e73ae84636e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:18:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 12592 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:18:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 20:18:39,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:39,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376847788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:39,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:39,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-25 20:18:39,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819898601] [2021-11-25 20:18:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:39,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:18:39,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:18:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:18:39,849 INFO L87 Difference]: Start difference. First operand 104612 states and 153468 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-25 20:18:41,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:18:44,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []