./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/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_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:56:28,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:56:28,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:56:28,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:56:28,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:56:28,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:56:28,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:56:28,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:56:28,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:56:28,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:56:28,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:56:28,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:56:28,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:56:28,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:56:28,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:56:28,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:56:28,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:56:28,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:56:28,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:56:28,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:56:28,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:56:28,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:56:28,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:56:28,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:56:28,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:56:28,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:56:28,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:56:28,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:56:28,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:56:28,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:56:28,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:56:28,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:56:28,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:56:28,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:56:28,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:56:28,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:56:28,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:56:28,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:56:28,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:56:28,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:56:28,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:56:28,950 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:56:28,993 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:56:28,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:56:28,994 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:56:28,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:56:28,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:56:28,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:56:28,997 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:56:28,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:56:28,998 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:56:28,998 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:56:28,998 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:56:29,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:56:29,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:56:29,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:56:29,000 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:56:29,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:56:29,002 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:56:29,002 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:56:29,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:56:29,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:56:29,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:56:29,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:56:29,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:56:29,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:56:29,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:56:29,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:56:29,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:56:29,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:56:29,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:56:29,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:56:29,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:56:29,007 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:56:29,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:56:29,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:56:29,008 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:56:29,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:56:29,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:56:29,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:56:29,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04a4b1f21e140a71b13d0aa3889e8a2db465377126c9603026e75e43052ee15d [2022-11-23 15:56:29,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:56:29,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:56:29,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:56:29,334 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:56:29,335 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:56:29,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2022-11-23 15:56:32,438 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:56:33,226 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:56:33,227 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2022-11-23 15:56:33,287 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/data/42328b4b2/eb0de88bd9454da880be61b0250f0901/FLAG407fdac7f [2022-11-23 15:56:33,310 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/data/42328b4b2/eb0de88bd9454da880be61b0250f0901 [2022-11-23 15:56:33,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:56:33,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:56:33,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:56:33,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:56:33,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:56:33,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:33" (1/1) ... [2022-11-23 15:56:33,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716ce97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:33, skipping insertion in model container [2022-11-23 15:56:33,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:56:33" (1/1) ... [2022-11-23 15:56:33,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:56:33,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:56:36,424 WARN L237 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_570ea89c-3a22-4168-a8f7-41246ad3e448/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2022-11-23 15:56:36,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:56:36,623 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:56:37,480 WARN L237 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_570ea89c-3a22-4168-a8f7-41246ad3e448/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i[386276,386289] [2022-11-23 15:56:37,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:56:37,636 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:56:37,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37 WrapperNode [2022-11-23 15:56:37,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:56:37,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:56:37,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:56:37,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:56:37,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:37,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,076 INFO L138 Inliner]: procedures = 356, calls = 3822, calls flagged for inlining = 167, calls inlined = 133, statements flattened = 7427 [2022-11-23 15:56:38,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:56:38,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:56:38,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:56:38,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:56:38,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,539 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:56:38,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:56:38,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:56:38,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:56:38,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (1/1) ... [2022-11-23 15:56:38,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:56:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:56:38,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:56:38,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:56:38,895 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-11-23 15:56:38,896 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-11-23 15:56:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2022-11-23 15:56:38,896 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2022-11-23 15:56:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-23 15:56:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:56:38,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:56:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2022-11-23 15:56:38,897 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2022-11-23 15:56:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 15:56:38,897 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 15:56:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-23 15:56:38,897 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-23 15:56:38,897 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-23 15:56:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-23 15:56:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure set_signals [2022-11-23 15:56:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure set_signals [2022-11-23 15:56:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure irq_test [2022-11-23 15:56:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure irq_test [2022-11-23 15:56:38,898 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_dma_bufs [2022-11-23 15:56:38,898 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_dma_bufs [2022-11-23 15:56:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_ioctl [2022-11-23 15:56:38,899 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_ioctl [2022-11-23 15:56:38,899 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:56:38,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:56:38,915 INFO L130 BoogieDeclarations]: Found specification of procedure flush_chars [2022-11-23 15:56:38,916 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_chars [2022-11-23 15:56:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2022-11-23 15:56:38,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2022-11-23 15:56:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 15:56:38,917 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 15:56:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 15:56:38,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 15:56:38,917 INFO L130 BoogieDeclarations]: Found specification of procedure tx_stop [2022-11-23 15:56:38,917 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_stop [2022-11-23 15:56:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure sca_init [2022-11-23 15:56:38,918 INFO L138 BoogieDeclarations]: Found implementation of procedure sca_init [2022-11-23 15:56:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-23 15:56:38,918 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-23 15:56:38,919 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 15:56:38,919 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 15:56:38,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:56:38,919 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:56:38,919 INFO L130 BoogieDeclarations]: Found specification of procedure chars_in_buffer [2022-11-23 15:56:38,919 INFO L138 BoogieDeclarations]: Found implementation of procedure chars_in_buffer [2022-11-23 15:56:38,919 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 15:56:38,920 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 15:56:38,920 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-11-23 15:56:38,920 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-11-23 15:56:38,921 INFO L130 BoogieDeclarations]: Found specification of procedure change_params [2022-11-23 15:56:38,921 INFO L138 BoogieDeclarations]: Found implementation of procedure change_params [2022-11-23 15:56:38,921 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2022-11-23 15:56:38,921 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2022-11-23 15:56:38,921 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 15:56:38,922 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 15:56:38,922 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2022-11-23 15:56:38,922 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2022-11-23 15:56:38,922 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 15:56:38,922 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 15:56:38,923 INFO L130 BoogieDeclarations]: Found specification of procedure set_break [2022-11-23 15:56:38,923 INFO L138 BoogieDeclarations]: Found implementation of procedure set_break [2022-11-23 15:56:38,923 INFO L130 BoogieDeclarations]: Found specification of procedure tx_start [2022-11-23 15:56:38,923 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_start [2022-11-23 15:56:38,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:56:38,923 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 15:56:38,923 INFO L130 BoogieDeclarations]: Found specification of procedure startup [2022-11-23 15:56:38,924 INFO L138 BoogieDeclarations]: Found implementation of procedure startup [2022-11-23 15:56:38,924 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_frame_bufs [2022-11-23 15:56:38,924 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_frame_bufs [2022-11-23 15:56:38,924 INFO L130 BoogieDeclarations]: Found specification of procedure rx_free_frame_buffers [2022-11-23 15:56:38,924 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_free_frame_buffers [2022-11-23 15:56:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:56:38,925 INFO L130 BoogieDeclarations]: Found specification of procedure wait_until_sent [2022-11-23 15:56:38,925 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_until_sent [2022-11-23 15:56:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-23 15:56:38,926 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-23 15:56:38,926 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 15:56:38,927 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 15:56:38,927 INFO L130 BoogieDeclarations]: Found specification of procedure synclinkmp_cleanup [2022-11-23 15:56:38,927 INFO L138 BoogieDeclarations]: Found implementation of procedure synclinkmp_cleanup [2022-11-23 15:56:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_tty_port [2022-11-23 15:56:38,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_tty_port [2022-11-23 15:56:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:56:38,928 INFO L130 BoogieDeclarations]: Found specification of procedure dtr_rts [2022-11-23 15:56:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure dtr_rts [2022-11-23 15:56:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-23 15:56:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-23 15:56:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:56:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure set_rate [2022-11-23 15:56:38,929 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rate [2022-11-23 15:56:38,929 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-23 15:56:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-23 15:56:38,930 INFO L130 BoogieDeclarations]: Found specification of procedure ioctl [2022-11-23 15:56:38,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ioctl [2022-11-23 15:56:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-23 15:56:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-23 15:56:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 15:56:38,931 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 15:56:38,931 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmset [2022-11-23 15:56:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmset [2022-11-23 15:56:38,932 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 15:56:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 15:56:38,932 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2022-11-23 15:56:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2022-11-23 15:56:38,932 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 15:56:38,932 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 15:56:38,933 INFO L130 BoogieDeclarations]: Found specification of procedure rx_stop [2022-11-23 15:56:38,933 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_stop [2022-11-23 15:56:38,933 INFO L130 BoogieDeclarations]: Found specification of procedure loopback_test [2022-11-23 15:56:38,934 INFO L138 BoogieDeclarations]: Found implementation of procedure loopback_test [2022-11-23 15:56:38,934 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-23 15:56:38,952 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-23 15:56:38,952 INFO L130 BoogieDeclarations]: Found specification of procedure hdlcdev_tx_timeout [2022-11-23 15:56:38,952 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlcdev_tx_timeout [2022-11-23 15:56:38,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:56:38,954 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-23 15:56:38,955 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-23 15:56:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 15:56:38,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 15:56:38,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:56:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2022-11-23 15:56:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2022-11-23 15:56:38,961 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hung_up_p [2022-11-23 15:56:38,961 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hung_up_p [2022-11-23 15:56:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure release_resources [2022-11-23 15:56:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resources [2022-11-23 15:56:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:56:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 15:56:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 15:56:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-23 15:56:38,962 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-23 15:56:38,962 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2022-11-23 15:56:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2022-11-23 15:56:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure tx_set_idle [2022-11-23 15:56:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_set_idle [2022-11-23 15:56:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure set_termios [2022-11-23 15:56:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure set_termios [2022-11-23 15:56:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:56:38,963 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:56:38,963 INFO L130 BoogieDeclarations]: Found specification of procedure write_room [2022-11-23 15:56:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure write_room [2022-11-23 15:56:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure enable_loopback [2022-11-23 15:56:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_loopback [2022-11-23 15:56:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure install [2022-11-23 15:56:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure install [2022-11-23 15:56:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_destroy [2022-11-23 15:56:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_destroy [2022-11-23 15:56:38,964 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:56:38,964 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:56:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure throttle [2022-11-23 15:56:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure throttle [2022-11-23 15:56:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-23 15:56:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-23 15:56:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:56:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:56:38,965 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_fifo [2022-11-23 15:56:38,965 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_fifo [2022-11-23 15:56:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_tty_port [2022-11-23 15:56:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_tty_port [2022-11-23 15:56:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:56:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 15:56:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 15:56:38,966 INFO L130 BoogieDeclarations]: Found specification of procedure tx_load_dma_buffer [2022-11-23 15:56:38,966 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_load_dma_buffer [2022-11-23 15:56:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure program_hw [2022-11-23 15:56:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure program_hw [2022-11-23 15:56:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure carrier_raised [2022-11-23 15:56:38,967 INFO L138 BoogieDeclarations]: Found implementation of procedure carrier_raised [2022-11-23 15:56:38,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:56:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:56:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure reset_port [2022-11-23 15:56:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_port [2022-11-23 15:56:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:56:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-23 15:56:38,968 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-23 15:56:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:56:38,968 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2022-11-23 15:56:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2022-11-23 15:56:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure register_test [2022-11-23 15:56:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure register_test [2022-11-23 15:56:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2022-11-23 15:56:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2022-11-23 15:56:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:56:38,969 INFO L130 BoogieDeclarations]: Found specification of procedure hangup [2022-11-23 15:56:38,969 INFO L138 BoogieDeclarations]: Found implementation of procedure hangup [2022-11-23 15:56:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 15:56:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure get_icount [2022-11-23 15:56:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure get_icount [2022-11-23 15:56:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ops_disconnect_1 [2022-11-23 15:56:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ops_disconnect_1 [2022-11-23 15:56:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure write_control_reg [2022-11-23 15:56:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure write_control_reg [2022-11-23 15:56:38,970 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2022-11-23 15:56:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2022-11-23 15:56:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure unthrottle [2022-11-23 15:56:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure unthrottle [2022-11-23 15:56:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure tx_release [2022-11-23 15:56:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_release [2022-11-23 15:56:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-23 15:56:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-23 15:56:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-23 15:56:38,972 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-23 15:56:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_mode [2022-11-23 15:56:38,972 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_mode [2022-11-23 15:56:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure rx_get_frame [2022-11-23 15:56:38,972 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_get_frame [2022-11-23 15:56:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure shutdown [2022-11-23 15:56:38,972 INFO L138 BoogieDeclarations]: Found implementation of procedure shutdown [2022-11-23 15:56:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-23 15:56:38,973 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-23 15:56:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure send_xchar [2022-11-23 15:56:38,973 INFO L138 BoogieDeclarations]: Found implementation of procedure send_xchar [2022-11-23 15:56:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-23 15:56:38,973 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-23 15:56:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure tiocmget [2022-11-23 15:56:38,973 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocmget [2022-11-23 15:56:38,973 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_ioctl [2022-11-23 15:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_ioctl [2022-11-23 15:56:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg16 [2022-11-23 15:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg16 [2022-11-23 15:56:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-23 15:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-23 15:56:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure get_signals [2022-11-23 15:56:38,974 INFO L138 BoogieDeclarations]: Found implementation of procedure get_signals [2022-11-23 15:56:38,974 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 15:56:38,975 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 15:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2022-11-23 15:56:38,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2022-11-23 15:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure rx_start [2022-11-23 15:56:38,975 INFO L138 BoogieDeclarations]: Found implementation of procedure rx_start [2022-11-23 15:56:38,975 INFO L130 BoogieDeclarations]: Found specification of procedure trace_block [2022-11-23 15:56:38,975 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_block [2022-11-23 15:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure sanity_check [2022-11-23 15:56:38,976 INFO L138 BoogieDeclarations]: Found implementation of procedure sanity_check [2022-11-23 15:56:38,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:56:38,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:56:38,977 INFO L130 BoogieDeclarations]: Found specification of procedure read_status_reg [2022-11-23 15:56:38,981 INFO L138 BoogieDeclarations]: Found implementation of procedure read_status_reg [2022-11-23 15:56:40,037 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:56:40,042 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:57:14,652 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:57:19,557 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:57:19,557 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:57:19,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:57:19 BoogieIcfgContainer [2022-11-23 15:57:19,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:57:19,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:57:19,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:57:19,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:57:19,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:56:33" (1/3) ... [2022-11-23 15:57:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0e5083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:57:19, skipping insertion in model container [2022-11-23 15:57:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:56:37" (2/3) ... [2022-11-23 15:57:19,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0e5083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:57:19, skipping insertion in model container [2022-11-23 15:57:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:57:19" (3/3) ... [2022-11-23 15:57:19,577 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--tty--synclinkmp.ko-main.cil.out.i [2022-11-23 15:57:19,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:57:19,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:57:19,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:57:19,738 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@32a19e5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:57:19,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:57:19,751 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) [2022-11-23 15:57:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:57:19,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:19,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:57:19,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1748456358, now seen corresponding path program 1 times [2022-11-23 15:57:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:19,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43166935] [2022-11-23 15:57:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:19,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:57:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:57:20,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:57:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43166935] [2022-11-23 15:57:20,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43166935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:57:20,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:57:20,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:57:20,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422285726] [2022-11-23 15:57:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:57:20,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:57:20,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:57:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:57:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:57:20,593 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) [2022-11-23 15:57:23,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:25,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:57:26,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:29,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:34,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:57:35,603 INFO L93 Difference]: Finished difference Result 6149 states and 9346 transitions. [2022-11-23 15:57:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:57:35,610 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 [2022-11-23 15:57:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:57:35,680 INFO L225 Difference]: With dead ends: 6149 [2022-11-23 15:57:35,680 INFO L226 Difference]: Without dead ends: 4092 [2022-11-23 15:57:35,702 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:57:35,708 INFO L413 NwaCegarLoop]: 3635 mSDtfsCounter, 3075 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 6393 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:57:35,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3078 Valid, 6393 Invalid, 687 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 683 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2022-11-23 15:57:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2022-11-23 15:57:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 4088. [2022-11-23 15:57:36,073 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) [2022-11-23 15:57:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 6181 transitions. [2022-11-23 15:57:36,108 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 6181 transitions. Word has length 16 [2022-11-23 15:57:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:57:36,109 INFO L495 AbstractCegarLoop]: Abstraction has 4088 states and 6181 transitions. [2022-11-23 15:57:36,109 INFO L496 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) [2022-11-23 15:57:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 6181 transitions. [2022-11-23 15:57:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:57:36,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:36,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:57:36,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:57:36,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1633633831, now seen corresponding path program 1 times [2022-11-23 15:57:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:36,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130237643] [2022-11-23 15:57:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:57:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:57:36,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:57:36,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130237643] [2022-11-23 15:57:36,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130237643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:57:36,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:57:36,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:57:36,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211705587] [2022-11-23 15:57:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:57:36,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:57:36,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:57:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:57:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:57:36,444 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) [2022-11-23 15:57:38,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:40,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:57:42,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:45,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:48,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:51,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:53,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:57:55,434 INFO L93 Difference]: Finished difference Result 6110 states and 9241 transitions. [2022-11-23 15:57:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:57:55,435 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 [2022-11-23 15:57:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:57:55,493 INFO L225 Difference]: With dead ends: 6110 [2022-11-23 15:57:55,493 INFO L226 Difference]: Without dead ends: 6107 [2022-11-23 15:57:55,501 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:57:55,502 INFO L413 NwaCegarLoop]: 3872 mSDtfsCounter, 3036 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3044 SdHoareTripleChecker+Valid, 6633 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:57:55,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3044 Valid, 6633 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 733 Invalid, 5 Unknown, 0 Unchecked, 18.6s Time] [2022-11-23 15:57:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6107 states. [2022-11-23 15:57:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6107 to 6102. [2022-11-23 15:57:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6102 states, 3673 states have (on average 1.3683637353661857) internal successors, (5026), 3826 states have internal predecessors, (5026), 2104 states have call successors, (2104), 326 states have call predecessors, (2104), 324 states have return successors, (2104), 2079 states have call predecessors, (2104), 2098 states have call successors, (2104) [2022-11-23 15:57:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6102 states to 6102 states and 9234 transitions. [2022-11-23 15:57:55,979 INFO L78 Accepts]: Start accepts. Automaton has 6102 states and 9234 transitions. Word has length 17 [2022-11-23 15:57:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:57:55,980 INFO L495 AbstractCegarLoop]: Abstraction has 6102 states and 9234 transitions. [2022-11-23 15:57:55,980 INFO L496 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) [2022-11-23 15:57:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6102 states and 9234 transitions. [2022-11-23 15:57:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 15:57:55,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:55,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:57:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:57:55,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash 895757577, now seen corresponding path program 1 times [2022-11-23 15:57:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:55,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514154065] [2022-11-23 15:57:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:57:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:57:56,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:57:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514154065] [2022-11-23 15:57:56,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514154065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:57:56,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:57:56,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:57:56,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592628953] [2022-11-23 15:57:56,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:57:56,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:57:56,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:57:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:57:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:57:56,372 INFO L87 Difference]: Start difference. First operand 6102 states and 9234 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) [2022-11-23 15:57:58,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:00,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:58:06,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:10,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:58:12,756 INFO L93 Difference]: Finished difference Result 6112 states and 9244 transitions. [2022-11-23 15:58:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:58:12,757 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 [2022-11-23 15:58:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:58:12,801 INFO L225 Difference]: With dead ends: 6112 [2022-11-23 15:58:12,801 INFO L226 Difference]: Without dead ends: 6109 [2022-11-23 15:58:12,809 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:58:12,812 INFO L413 NwaCegarLoop]: 3718 mSDtfsCounter, 3069 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:58:12,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3072 Valid, 6482 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 700 Invalid, 4 Unknown, 0 Unchecked, 15.9s Time] [2022-11-23 15:58:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2022-11-23 15:58:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 6104. [2022-11-23 15:58:13,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6104 states, 3675 states have (on average 1.3684353741496598) internal successors, (5029), 3828 states have internal predecessors, (5029), 2104 states have call successors, (2104), 326 states have call predecessors, (2104), 324 states have return successors, (2104), 2079 states have call predecessors, (2104), 2098 states have call successors, (2104) [2022-11-23 15:58:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6104 states to 6104 states and 9237 transitions. [2022-11-23 15:58:13,258 INFO L78 Accepts]: Start accepts. Automaton has 6104 states and 9237 transitions. Word has length 18 [2022-11-23 15:58:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:58:13,258 INFO L495 AbstractCegarLoop]: Abstraction has 6104 states and 9237 transitions. [2022-11-23 15:58:13,261 INFO L496 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) [2022-11-23 15:58:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6104 states and 9237 transitions. [2022-11-23 15:58:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:58:13,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:58:13,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:58:13,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:58:13,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:58:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:58:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1997484764, now seen corresponding path program 1 times [2022-11-23 15:58:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:58:13,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174631206] [2022-11-23 15:58:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:58:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:58:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:58:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:58:13,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:58:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174631206] [2022-11-23 15:58:13,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174631206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:58:13,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:58:13,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:58:13,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196710684] [2022-11-23 15:58:13,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:58:13,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:58:13,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:58:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:58:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:58:13,561 INFO L87 Difference]: Start difference. First operand 6104 states and 9237 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) [2022-11-23 15:58:15,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:17,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:58:19,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:23,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:27,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:58:29,556 INFO L93 Difference]: Finished difference Result 8435 states and 12671 transitions. [2022-11-23 15:58:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:58:29,556 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 [2022-11-23 15:58:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:58:29,605 INFO L225 Difference]: With dead ends: 8435 [2022-11-23 15:58:29,605 INFO L226 Difference]: Without dead ends: 8424 [2022-11-23 15:58:29,613 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:58:29,614 INFO L413 NwaCegarLoop]: 3734 mSDtfsCounter, 2997 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2999 SdHoareTripleChecker+Valid, 6480 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:58:29,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2999 Valid, 6480 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 703 Invalid, 4 Unknown, 0 Unchecked, 15.6s Time] [2022-11-23 15:58:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8424 states. [2022-11-23 15:58:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8424 to 8419. [2022-11-23 15:58:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8419 states, 5057 states have (on average 1.3622701206248764) internal successors, (6889), 5268 states have internal predecessors, (6889), 2874 states have call successors, (2874), 490 states have call predecessors, (2874), 487 states have return successors, (2886), 2838 states have call predecessors, (2886), 2868 states have call successors, (2886) [2022-11-23 15:58:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8419 states to 8419 states and 12649 transitions. [2022-11-23 15:58:30,196 INFO L78 Accepts]: Start accepts. Automaton has 8419 states and 12649 transitions. Word has length 19 [2022-11-23 15:58:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:58:30,196 INFO L495 AbstractCegarLoop]: Abstraction has 8419 states and 12649 transitions. [2022-11-23 15:58:30,197 INFO L496 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) [2022-11-23 15:58:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8419 states and 12649 transitions. [2022-11-23 15:58:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 15:58:30,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:58:30,201 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:58:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:58:30,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:58:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:58:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1004804396, now seen corresponding path program 1 times [2022-11-23 15:58:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:58:30,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239021427] [2022-11-23 15:58:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:58:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:58:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:58:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:58:30,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:58:30,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239021427] [2022-11-23 15:58:30,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239021427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:58:30,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:58:30,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:58:30,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404419968] [2022-11-23 15:58:30,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:58:30,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:58:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:58:30,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:58:30,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:58:30,702 INFO L87 Difference]: Start difference. First operand 8419 states and 12649 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) [2022-11-23 15:58:32,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:34,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:58:37,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:39,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:42,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:45,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:46,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:58:51,694 INFO L93 Difference]: Finished difference Result 13855 states and 21092 transitions. [2022-11-23 15:58:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:58:51,695 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 [2022-11-23 15:58:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:58:51,798 INFO L225 Difference]: With dead ends: 13855 [2022-11-23 15:58:51,798 INFO L226 Difference]: Without dead ends: 13844 [2022-11-23 15:58:51,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:58:51,813 INFO L413 NwaCegarLoop]: 4690 mSDtfsCounter, 4033 mSDsluCounter, 6819 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 237 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4041 SdHoareTripleChecker+Valid, 11509 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:58:51,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4041 Valid, 11509 Invalid, 1658 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [237 Valid, 1417 Invalid, 4 Unknown, 0 Unchecked, 20.3s Time] [2022-11-23 15:58:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13844 states. [2022-11-23 15:58:52,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13844 to 12407. [2022-11-23 15:58:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12407 states, 7463 states have (on average 1.3651346643440976) internal successors, (10188), 7779 states have internal predecessors, (10188), 4244 states have call successors, (4244), 705 states have call predecessors, (4244), 699 states have return successors, (4271), 4185 states have call predecessors, (4271), 4238 states have call successors, (4271) [2022-11-23 15:58:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12407 states to 12407 states and 18703 transitions. [2022-11-23 15:58:52,867 INFO L78 Accepts]: Start accepts. Automaton has 12407 states and 18703 transitions. Word has length 26 [2022-11-23 15:58:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:58:52,868 INFO L495 AbstractCegarLoop]: Abstraction has 12407 states and 18703 transitions. [2022-11-23 15:58:52,868 INFO L496 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) [2022-11-23 15:58:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 12407 states and 18703 transitions. [2022-11-23 15:58:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:58:52,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:58:52,875 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:58:52,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:58:52,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:58:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:58:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1931477235, now seen corresponding path program 1 times [2022-11-23 15:58:52,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:58:52,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751753654] [2022-11-23 15:58:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:58:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:58:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:58:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:58:53,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:58:53,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751753654] [2022-11-23 15:58:53,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751753654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:58:53,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:58:53,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:58:53,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194337354] [2022-11-23 15:58:53,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:58:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:58:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:58:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:58:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:58:53,239 INFO L87 Difference]: Start difference. First operand 12407 states and 18703 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) [2022-11-23 15:58:55,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:58:57,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:59:01,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:06,852 INFO L93 Difference]: Finished difference Result 16544 states and 24945 transitions. [2022-11-23 15:59:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:06,853 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 [2022-11-23 15:59:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:06,960 INFO L225 Difference]: With dead ends: 16544 [2022-11-23 15:59:06,961 INFO L226 Difference]: Without dead ends: 16541 [2022-11-23 15:59:06,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:06,982 INFO L413 NwaCegarLoop]: 3820 mSDtfsCounter, 3069 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 6578 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:06,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3072 Valid, 6578 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 719 Invalid, 3 Unknown, 0 Unchecked, 13.1s Time] [2022-11-23 15:59:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16541 states. [2022-11-23 15:59:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16541 to 16537. [2022-11-23 15:59:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16537 states, 9953 states have (on average 1.3652165176328745) internal successors, (13588), 10376 states have internal predecessors, (13588), 5654 states have call successors, (5654), 936 states have call predecessors, (5654), 929 states have return successors, (5696), 5577 states have call predecessors, (5696), 5648 states have call successors, (5696) [2022-11-23 15:59:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16537 states to 16537 states and 24938 transitions. [2022-11-23 15:59:08,182 INFO L78 Accepts]: Start accepts. Automaton has 16537 states and 24938 transitions. Word has length 38 [2022-11-23 15:59:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:08,183 INFO L495 AbstractCegarLoop]: Abstraction has 16537 states and 24938 transitions. [2022-11-23 15:59:08,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (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) [2022-11-23 15:59:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 16537 states and 24938 transitions. [2022-11-23 15:59:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 15:59:08,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:08,193 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:59:08,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:59:08,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:08,194 INFO L85 PathProgramCache]: Analyzing trace with hash -254953940, now seen corresponding path program 1 times [2022-11-23 15:59:08,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:08,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661450048] [2022-11-23 15:59:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:08,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:59:08,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:08,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661450048] [2022-11-23 15:59:08,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661450048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:08,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:08,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299120689] [2022-11-23 15:59:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:08,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:08,636 INFO L87 Difference]: Start difference. First operand 16537 states and 24938 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) [2022-11-23 15:59:10,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:12,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:59:18,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:19,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:21,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:23,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:25,579 INFO L93 Difference]: Finished difference Result 16546 states and 24947 transitions. [2022-11-23 15:59:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:25,580 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 [2022-11-23 15:59:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:25,679 INFO L225 Difference]: With dead ends: 16546 [2022-11-23 15:59:25,680 INFO L226 Difference]: Without dead ends: 16538 [2022-11-23 15:59:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:25,700 INFO L413 NwaCegarLoop]: 3820 mSDtfsCounter, 3066 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3069 SdHoareTripleChecker+Valid, 6581 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:25,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3069 Valid, 6581 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 718 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2022-11-23 15:59:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16538 states. [2022-11-23 15:59:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16538 to 16534. [2022-11-23 15:59:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16534 states, 9951 states have (on average 1.3650889357853482) internal successors, (13584), 10374 states have internal predecessors, (13584), 5653 states have call successors, (5653), 936 states have call predecessors, (5653), 929 states have return successors, (5695), 5576 states have call predecessors, (5695), 5647 states have call successors, (5695) [2022-11-23 15:59:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16534 states to 16534 states and 24932 transitions. [2022-11-23 15:59:26,897 INFO L78 Accepts]: Start accepts. Automaton has 16534 states and 24932 transitions. Word has length 39 [2022-11-23 15:59:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:26,897 INFO L495 AbstractCegarLoop]: Abstraction has 16534 states and 24932 transitions. [2022-11-23 15:59:26,897 INFO L496 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) [2022-11-23 15:59:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 16534 states and 24932 transitions. [2022-11-23 15:59:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 15:59:26,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:26,906 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:59:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:59:26,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash 685161238, now seen corresponding path program 1 times [2022-11-23 15:59:26,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:26,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509756707] [2022-11-23 15:59:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:26,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:59:27,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:27,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509756707] [2022-11-23 15:59:27,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509756707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:27,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:27,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:27,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855108571] [2022-11-23 15:59:27,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:27,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:27,254 INFO L87 Difference]: Start difference. First operand 16534 states and 24932 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) [2022-11-23 15:59:29,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:31,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:59:35,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:37,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:40,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:43,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:45,521 INFO L93 Difference]: Finished difference Result 16615 states and 25012 transitions. [2022-11-23 15:59:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:45,522 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 [2022-11-23 15:59:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:45,608 INFO L225 Difference]: With dead ends: 16615 [2022-11-23 15:59:45,608 INFO L226 Difference]: Without dead ends: 16606 [2022-11-23 15:59:45,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:45,622 INFO L413 NwaCegarLoop]: 3820 mSDtfsCounter, 3028 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3032 SdHoareTripleChecker+Valid, 6584 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:45,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3032 Valid, 6584 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 719 Invalid, 5 Unknown, 0 Unchecked, 17.7s Time] [2022-11-23 15:59:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16606 states. [2022-11-23 15:59:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16606 to 16602. [2022-11-23 15:59:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16602 states, 9992 states have (on average 1.364591673338671) internal successors, (13635), 10415 states have internal predecessors, (13635), 5660 states have call successors, (5660), 956 states have call predecessors, (5660), 949 states have return successors, (5702), 5583 states have call predecessors, (5702), 5654 states have call successors, (5702) [2022-11-23 15:59:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16602 states to 16602 states and 24997 transitions. [2022-11-23 15:59:46,724 INFO L78 Accepts]: Start accepts. Automaton has 16602 states and 24997 transitions. Word has length 40 [2022-11-23 15:59:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:46,725 INFO L495 AbstractCegarLoop]: Abstraction has 16602 states and 24997 transitions. [2022-11-23 15:59:46,725 INFO L496 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) [2022-11-23 15:59:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 16602 states and 24997 transitions. [2022-11-23 15:59:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 15:59:46,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:46,733 INFO L195 NwaCegarLoop]: 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] [2022-11-23 15:59:46,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:59:46,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash -236034449, now seen corresponding path program 1 times [2022-11-23 15:59:46,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:46,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142633119] [2022-11-23 15:59:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:46,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:59:47,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142633119] [2022-11-23 15:59:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142633119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:47,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:47,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:47,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874409585] [2022-11-23 15:59:47,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:47,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:47,056 INFO L87 Difference]: Start difference. First operand 16602 states and 24997 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) [2022-11-23 15:59:49,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:51,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 15:59:52,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:56,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:59,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:02,020 INFO L93 Difference]: Finished difference Result 18885 states and 28382 transitions. [2022-11-23 16:00:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:02,020 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 [2022-11-23 16:00:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:02,112 INFO L225 Difference]: With dead ends: 18885 [2022-11-23 16:00:02,113 INFO L226 Difference]: Without dead ends: 18874 [2022-11-23 16:00:02,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:02,129 INFO L413 NwaCegarLoop]: 3853 mSDtfsCounter, 2993 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 6599 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:02,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2995 Valid, 6599 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 724 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2022-11-23 16:00:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18874 states. [2022-11-23 16:00:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18874 to 18848. [2022-11-23 16:00:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18848 states, 11339 states have (on average 1.3631713554987213) internal successors, (15457), 11816 states have internal predecessors, (15457), 6409 states have call successors, (6409), 1105 states have call predecessors, (6409), 1099 states have return successors, (6463), 6329 states have call predecessors, (6463), 6403 states have call successors, (6463) [2022-11-23 16:00:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18848 states to 18848 states and 28329 transitions. [2022-11-23 16:00:03,274 INFO L78 Accepts]: Start accepts. Automaton has 18848 states and 28329 transitions. Word has length 41 [2022-11-23 16:00:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:03,275 INFO L495 AbstractCegarLoop]: Abstraction has 18848 states and 28329 transitions. [2022-11-23 16:00:03,275 INFO L496 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) [2022-11-23 16:00:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18848 states and 28329 transitions. [2022-11-23 16:00:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 16:00:03,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:03,286 INFO L195 NwaCegarLoop]: 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, 1] [2022-11-23 16:00:03,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:00:03,287 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:03,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1060231874, now seen corresponding path program 1 times [2022-11-23 16:00:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087380222] [2022-11-23 16:00:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:03,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:03,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087380222] [2022-11-23 16:00:03,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087380222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:03,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:03,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:00:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887623168] [2022-11-23 16:00:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:03,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:03,489 INFO L87 Difference]: Start difference. First operand 18848 states and 28329 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (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) [2022-11-23 16:00:05,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:08,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:00:15,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:18,111 INFO L93 Difference]: Finished difference Result 47330 states and 70721 transitions. [2022-11-23 16:00:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (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 50 [2022-11-23 16:00:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:18,252 INFO L225 Difference]: With dead ends: 47330 [2022-11-23 16:00:18,253 INFO L226 Difference]: Without dead ends: 28483 [2022-11-23 16:00:18,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:18,374 INFO L413 NwaCegarLoop]: 3583 mSDtfsCounter, 1563 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 6074 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:18,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 6074 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1009 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2022-11-23 16:00:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28483 states. [2022-11-23 16:00:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28483 to 26323. [2022-11-23 16:00:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26323 states, 15692 states have (on average 1.3516441498852918) internal successors, (21210), 16326 states have internal predecessors, (21210), 8981 states have call successors, (8981), 1655 states have call predecessors, (8981), 1649 states have return successors, (9042), 8870 states have call predecessors, (9042), 8975 states have call successors, (9042) [2022-11-23 16:00:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26323 states to 26323 states and 39233 transitions. [2022-11-23 16:00:20,150 INFO L78 Accepts]: Start accepts. Automaton has 26323 states and 39233 transitions. Word has length 50 [2022-11-23 16:00:20,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:20,151 INFO L495 AbstractCegarLoop]: Abstraction has 26323 states and 39233 transitions. [2022-11-23 16:00:20,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (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) [2022-11-23 16:00:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26323 states and 39233 transitions. [2022-11-23 16:00:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 16:00:20,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:20,170 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:00:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:00:20,170 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash 50901793, now seen corresponding path program 1 times [2022-11-23 16:00:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:20,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495228905] [2022-11-23 16:00:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:20,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:20,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495228905] [2022-11-23 16:00:20,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495228905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:20,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:20,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:00:20,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95632184] [2022-11-23 16:00:20,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:20,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:20,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:20,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:20,469 INFO L87 Difference]: Start difference. First operand 26323 states and 39233 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-11-23 16:00:22,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:25,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:00:27,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:29,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:33,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:35,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:37,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:39,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:43,273 INFO L93 Difference]: Finished difference Result 68271 states and 101926 transitions. [2022-11-23 16:00:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:43,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 62 [2022-11-23 16:00:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:43,480 INFO L225 Difference]: With dead ends: 68271 [2022-11-23 16:00:43,480 INFO L226 Difference]: Without dead ends: 41949 [2022-11-23 16:00:43,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:43,588 INFO L413 NwaCegarLoop]: 4239 mSDtfsCounter, 2521 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 127 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2525 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:43,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2525 Valid, 6696 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1201 Invalid, 5 Unknown, 0 Unchecked, 21.2s Time] [2022-11-23 16:00:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41949 states. [2022-11-23 16:00:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41949 to 41903. [2022-11-23 16:00:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41903 states, 25188 states have (on average 1.33496109258377) internal successors, (33625), 26234 states have internal predecessors, (33625), 14043 states have call successors, (14043), 2688 states have call predecessors, (14043), 2671 states have return successors, (14127), 13847 states have call predecessors, (14127), 14037 states have call successors, (14127) [2022-11-23 16:00:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41903 states to 41903 states and 61795 transitions. [2022-11-23 16:00:45,846 INFO L78 Accepts]: Start accepts. Automaton has 41903 states and 61795 transitions. Word has length 62 [2022-11-23 16:00:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:45,847 INFO L495 AbstractCegarLoop]: Abstraction has 41903 states and 61795 transitions. [2022-11-23 16:00:45,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-11-23 16:00:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 41903 states and 61795 transitions. [2022-11-23 16:00:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 16:00:45,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:45,861 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:00:45,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:00:45,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1173761086, now seen corresponding path program 1 times [2022-11-23 16:00:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:45,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827982116] [2022-11-23 16:00:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:45,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:00:46,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:46,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827982116] [2022-11-23 16:00:46,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827982116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:46,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:46,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 16:00:46,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433062876] [2022-11-23 16:00:46,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:46,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:00:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:00:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:00:46,582 INFO L87 Difference]: Start difference. First operand 41903 states and 61795 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) [2022-11-23 16:00:48,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:51,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:00:53,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:05,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:11,393 INFO L93 Difference]: Finished difference Result 82792 states and 121987 transitions. [2022-11-23 16:01:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:01:11,393 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 [2022-11-23 16:01:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:11,581 INFO L225 Difference]: With dead ends: 82792 [2022-11-23 16:01:11,581 INFO L226 Difference]: Without dead ends: 40890 [2022-11-23 16:01:11,956 INFO L412 NwaCegarLoop]: 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 [2022-11-23 16:01:11,957 INFO L413 NwaCegarLoop]: 3684 mSDtfsCounter, 2668 mSDsluCounter, 13823 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 27 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2680 SdHoareTripleChecker+Valid, 17507 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:11,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2680 Valid, 17507 Invalid, 1946 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 1915 Invalid, 4 Unknown, 0 Unchecked, 23.0s Time] [2022-11-23 16:01:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40890 states. [2022-11-23 16:01:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40890 to 40887. [2022-11-23 16:01:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40887 states, 24606 states have (on average 1.3326424449321304) internal successors, (32791), 25616 states have internal predecessors, (32791), 13631 states have call successors, (13631), 2666 states have call predecessors, (13631), 2649 states have return successors, (13711), 13447 states have call predecessors, (13711), 13625 states have call successors, (13711) [2022-11-23 16:01:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40887 states to 40887 states and 60133 transitions. [2022-11-23 16:01:14,077 INFO L78 Accepts]: Start accepts. Automaton has 40887 states and 60133 transitions. Word has length 61 [2022-11-23 16:01:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:14,078 INFO L495 AbstractCegarLoop]: Abstraction has 40887 states and 60133 transitions. [2022-11-23 16:01:14,078 INFO L496 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) [2022-11-23 16:01:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 40887 states and 60133 transitions. [2022-11-23 16:01:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 16:01:14,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:14,093 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:01:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:01:14,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 462198684, now seen corresponding path program 1 times [2022-11-23 16:01:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:14,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127373771] [2022-11-23 16:01:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:01:14,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:14,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127373771] [2022-11-23 16:01:14,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127373771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:14,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:14,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885259976] [2022-11-23 16:01:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:14,396 INFO L87 Difference]: Start difference. First operand 40887 states and 60133 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) [2022-11-23 16:01:16,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:18,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:01:21,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:24,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:27,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:30,073 INFO L93 Difference]: Finished difference Result 41493 states and 60871 transitions. [2022-11-23 16:01:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:30,074 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 [2022-11-23 16:01:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:30,199 INFO L225 Difference]: With dead ends: 41493 [2022-11-23 16:01:30,199 INFO L226 Difference]: Without dead ends: 41490 [2022-11-23 16:01:30,211 INFO L412 NwaCegarLoop]: 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 [2022-11-23 16:01:30,211 INFO L413 NwaCegarLoop]: 2903 mSDtfsCounter, 279 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 5593 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:30,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 5593 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 686 Invalid, 4 Unknown, 0 Unchecked, 14.0s Time] [2022-11-23 16:01:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41490 states. [2022-11-23 16:01:32,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41490 to 41490. [2022-11-23 16:01:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41490 states, 24926 states have (on average 1.3300569686271364) internal successors, (33153), 25947 states have internal predecessors, (33153), 13812 states have call successors, (13812), 2768 states have call predecessors, (13812), 2751 states have return successors, (13894), 13629 states have call predecessors, (13894), 13807 states have call successors, (13894) [2022-11-23 16:01:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41490 states to 41490 states and 60859 transitions. [2022-11-23 16:01:32,203 INFO L78 Accepts]: Start accepts. Automaton has 41490 states and 60859 transitions. Word has length 71 [2022-11-23 16:01:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:32,203 INFO L495 AbstractCegarLoop]: Abstraction has 41490 states and 60859 transitions. [2022-11-23 16:01:32,203 INFO L496 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) [2022-11-23 16:01:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 41490 states and 60859 transitions. [2022-11-23 16:01:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 16:01:32,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:32,240 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:01:32,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:01:32,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash -900154318, now seen corresponding path program 1 times [2022-11-23 16:01:32,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493314590] [2022-11-23 16:01:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:32,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 16:01:32,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:32,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493314590] [2022-11-23 16:01:32,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493314590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:32,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:32,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:32,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006090584] [2022-11-23 16:01:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:32,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:32,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:32,985 INFO L87 Difference]: Start difference. First operand 41490 states and 60859 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) [2022-11-23 16:01:35,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:37,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:01:39,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:48,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:51,575 INFO L93 Difference]: Finished difference Result 114469 states and 167426 transitions. [2022-11-23 16:01:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:51,579 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 [2022-11-23 16:01:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:52,000 INFO L225 Difference]: With dead ends: 114469 [2022-11-23 16:01:52,000 INFO L226 Difference]: Without dead ends: 72980 [2022-11-23 16:01:52,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:52,266 INFO L413 NwaCegarLoop]: 4730 mSDtfsCounter, 2524 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 7493 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:52,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2527 Valid, 7493 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 829 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 16:01:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72980 states. [2022-11-23 16:01:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72980 to 72941. [2022-11-23 16:01:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72941 states, 43630 states have (on average 1.324868209947284) internal successors, (57804), 45582 states have internal predecessors, (57804), 24261 states have call successors, (24261), 5082 states have call predecessors, (24261), 5049 states have return successors, (24432), 23893 states have call predecessors, (24432), 24256 states have call successors, (24432) [2022-11-23 16:01:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72941 states to 72941 states and 106497 transitions. [2022-11-23 16:01:57,007 INFO L78 Accepts]: Start accepts. Automaton has 72941 states and 106497 transitions. Word has length 96 [2022-11-23 16:01:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:57,008 INFO L495 AbstractCegarLoop]: Abstraction has 72941 states and 106497 transitions. [2022-11-23 16:01:57,008 INFO L496 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) [2022-11-23 16:01:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 72941 states and 106497 transitions. [2022-11-23 16:01:57,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 16:01:57,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:57,137 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:01:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 16:01:57,138 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1833935798, now seen corresponding path program 1 times [2022-11-23 16:01:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662256248] [2022-11-23 16:01:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 16:01:58,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:58,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662256248] [2022-11-23 16:01:58,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662256248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:58,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:58,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414882991] [2022-11-23 16:01:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:58,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:58,484 INFO L87 Difference]: Start difference. First operand 72941 states and 106497 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) [2022-11-23 16:02:00,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:02,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:02:05,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:10,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:13,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:16,635 INFO L93 Difference]: Finished difference Result 146983 states and 214718 transitions. [2022-11-23 16:02:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:16,636 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 [2022-11-23 16:02:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:16,903 INFO L225 Difference]: With dead ends: 146983 [2022-11-23 16:02:16,903 INFO L226 Difference]: Without dead ends: 74043 [2022-11-23 16:02:17,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:17,102 INFO L413 NwaCegarLoop]: 2776 mSDtfsCounter, 35 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5531 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:17,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 5531 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 674 Invalid, 4 Unknown, 0 Unchecked, 14.8s Time] [2022-11-23 16:02:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74043 states. [2022-11-23 16:02:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74043 to 72991. [2022-11-23 16:02:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72991 states, 43680 states have (on average 1.324496336996337) internal successors, (57854), 45632 states have internal predecessors, (57854), 24261 states have call successors, (24261), 5082 states have call predecessors, (24261), 5049 states have return successors, (24432), 23893 states have call predecessors, (24432), 24256 states have call successors, (24432) [2022-11-23 16:02:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72991 states to 72991 states and 106547 transitions. [2022-11-23 16:02:21,691 INFO L78 Accepts]: Start accepts. Automaton has 72991 states and 106547 transitions. Word has length 107 [2022-11-23 16:02:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:21,691 INFO L495 AbstractCegarLoop]: Abstraction has 72991 states and 106547 transitions. [2022-11-23 16:02:21,691 INFO L496 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) [2022-11-23 16:02:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 72991 states and 106547 transitions. [2022-11-23 16:02:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 16:02:21,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:21,788 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:02:21,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 16:02:21,789 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 987666784, now seen corresponding path program 1 times [2022-11-23 16:02:21,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:21,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241571959] [2022-11-23 16:02:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 16:02:23,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:23,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241571959] [2022-11-23 16:02:23,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241571959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:02:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658871572] [2022-11-23 16:02:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:23,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:02:23,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:02:23,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:02:23,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:02:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 7162 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:02:26,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:02:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-23 16:02:27,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:02:27,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658871572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:27,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:02:27,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-23 16:02:27,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268510058] [2022-11-23 16:02:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:27,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:27,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:27,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:02:27,390 INFO L87 Difference]: Start difference. First operand 72991 states and 106547 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) [2022-11-23 16:02:29,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:31,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:02:40,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:44,120 INFO L93 Difference]: Finished difference Result 104125 states and 152300 transitions. [2022-11-23 16:02:44,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:44,120 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 [2022-11-23 16:02:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:44,506 INFO L225 Difference]: With dead ends: 104125 [2022-11-23 16:02:44,507 INFO L226 Difference]: Without dead ends: 104122 [2022-11-23 16:02:44,542 INFO L412 NwaCegarLoop]: 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 [2022-11-23 16:02:44,543 INFO L413 NwaCegarLoop]: 3945 mSDtfsCounter, 2974 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 6701 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:44,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2977 Valid, 6701 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 732 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2022-11-23 16:02:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104122 states. [2022-11-23 16:02:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104122 to 97907. [2022-11-23 16:02:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97907 states, 58609 states have (on average 1.326110324352915) internal successors, (77722), 61238 states have internal predecessors, (77722), 32617 states have call successors, (32617), 6727 states have call predecessors, (32617), 6680 states have return successors, (32852), 32102 states have call predecessors, (32852), 32612 states have call successors, (32852) [2022-11-23 16:02:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97907 states to 97907 states and 143191 transitions. [2022-11-23 16:02:50,154 INFO L78 Accepts]: Start accepts. Automaton has 97907 states and 143191 transitions. Word has length 144 [2022-11-23 16:02:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:50,154 INFO L495 AbstractCegarLoop]: Abstraction has 97907 states and 143191 transitions. [2022-11-23 16:02:50,154 INFO L496 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) [2022-11-23 16:02:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 97907 states and 143191 transitions. [2022-11-23 16:02:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 16:02:50,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:50,251 INFO L195 NwaCegarLoop]: 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] [2022-11-23 16:02:50,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:02:50,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 16:02:50,459 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 551693151, now seen corresponding path program 1 times [2022-11-23 16:02:50,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:50,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104345040] [2022-11-23 16:02:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:50,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 16:02:52,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104345040] [2022-11-23 16:02:52,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104345040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:02:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397591663] [2022-11-23 16:02:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:52,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:02:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:02:52,570 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:02:52,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_570ea89c-3a22-4168-a8f7-41246ad3e448/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process