./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/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_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/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_6394114b-7852-4c4e-b3f0-855ce3b61d73/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 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- 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 15:05:12,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:05:12,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:05:12,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:05:12,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:05:12,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:05:12,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:05:12,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:05:12,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:05:12,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:05:12,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:05:12,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:05:12,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:05:12,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:05:12,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:05:12,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:05:12,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:05:12,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:05:12,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:05:12,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:05:12,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:05:12,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:05:12,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:05:12,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:05:12,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:05:12,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:05:12,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:05:12,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:05:12,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:05:12,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:05:12,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:05:12,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:05:12,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:05:12,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:05:12,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:05:12,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:05:13,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:05:13,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:05:13,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:05:13,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:05:13,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:05:13,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:05:13,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:05:13,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:05:13,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:05:13,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:05:13,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:05:13,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:05:13,050 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:05:13,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:05:13,050 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:05:13,050 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:05:13,051 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:05:13,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:05:13,052 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:05:13,052 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:05:13,052 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:05:13,052 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:05:13,053 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:05:13,053 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:05:13,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:05:13,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:05:13,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:05:13,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:05:13,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:05:13,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:05:13,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:05:13,055 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:05:13,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:05:13,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:05:13,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:05:13,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:05:13,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:05:13,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:05:13,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:05:13,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:05:13,058 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:05:13,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:05:13,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:05:13,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:05:13,059 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_6394114b-7852-4c4e-b3f0-855ce3b61d73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2022-11-23 15:05:13,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:05:13,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:05:13,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:05:13,403 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:05:13,403 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:05:13,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2022-11-23 15:05:16,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:05:17,229 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:05:17,230 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2022-11-23 15:05:17,279 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/data/72b3dbc13/37bd73c77f674780946a116f0e6445af/FLAG4ec958323 [2022-11-23 15:05:17,298 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/data/72b3dbc13/37bd73c77f674780946a116f0e6445af [2022-11-23 15:05:17,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:05:17,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:05:17,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:05:17,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:05:17,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:05:17,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:17" (1/1) ... [2022-11-23 15:05:17,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579df0ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:17, skipping insertion in model container [2022-11-23 15:05:17,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:17" (1/1) ... [2022-11-23 15:05:17,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:05:17,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:05:18,502 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_6394114b-7852-4c4e-b3f0-855ce3b61d73/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2022-11-23 15:05:19,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:05:19,238 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:05:19,422 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_6394114b-7852-4c4e-b3f0-855ce3b61d73/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2022-11-23 15:05:19,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:05:19,877 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:05:19,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19 WrapperNode [2022-11-23 15:05:19,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:05:19,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:05:19,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:05:19,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:05:19,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,297 INFO L138 Inliner]: procedures = 245, calls = 3570, calls flagged for inlining = 118, calls inlined = 118, statements flattened = 6651 [2022-11-23 15:05:20,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:05:20,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:05:20,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:05:20,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:05:20,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,693 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,717 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:05:20,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:05:20,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:05:20,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:05:20,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (1/1) ... [2022-11-23 15:05:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:05:20,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:20,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:05:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:05:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2022-11-23 15:05:20,876 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2022-11-23 15:05:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2022-11-23 15:05:20,877 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2022-11-23 15:05:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_18 [2022-11-23 15:05:20,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_18 [2022-11-23 15:05:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:05:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:05:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:05:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:05:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_destruct [2022-11-23 15:05:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_destruct [2022-11-23 15:05:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-23 15:05:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-23 15:05:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-23 15:05:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-23 15:05:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_22 [2022-11-23 15:05:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_22 [2022-11-23 15:05:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2022-11-23 15:05:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2022-11-23 15:05:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:05:20,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:05:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-23 15:05:20,880 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-23 15:05:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-23 15:05:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-23 15:05:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2022-11-23 15:05:20,882 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2022-11-23 15:05:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 15:05:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 15:05:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 15:05:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 15:05:20,883 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-11-23 15:05:20,883 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-11-23 15:05:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-23 15:05:20,884 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-23 15:05:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:05:20,884 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:05:20,884 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:05:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:05:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-23 15:05:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-23 15:05:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 15:05:20,885 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 15:05:20,885 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2022-11-23 15:05:20,886 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2022-11-23 15:05:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2022-11-23 15:05:20,886 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2022-11-23 15:05:20,886 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2022-11-23 15:05:20,887 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2022-11-23 15:05:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:05:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 15:05:20,887 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2022-11-23 15:05:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2022-11-23 15:05:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-23 15:05:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-23 15:05:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:05:20,888 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2022-11-23 15:05:20,888 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2022-11-23 15:05:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2022-11-23 15:05:20,889 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2022-11-23 15:05:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-23 15:05:20,889 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 15:05:20,889 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 15:05:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2022-11-23 15:05:20,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2022-11-23 15:05:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:05:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:05:20,890 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-23 15:05:20,890 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-23 15:05:20,891 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-23 15:05:20,891 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-23 15:05:20,892 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 15:05:20,892 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 15:05:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 15:05:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 15:05:20,893 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 15:05:20,893 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 15:05:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2022-11-23 15:05:20,894 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2022-11-23 15:05:20,894 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_shutdown [2022-11-23 15:05:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_shutdown [2022-11-23 15:05:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2022-11-23 15:05:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2022-11-23 15:05:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2022-11-23 15:05:20,895 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2022-11-23 15:05:20,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:05:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-23 15:05:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-23 15:05:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-23 15:05:20,896 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-23 15:05:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2022-11-23 15:05:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2022-11-23 15:05:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 15:05:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 15:05:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:05:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2022-11-23 15:05:20,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2022-11-23 15:05:20,898 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2022-11-23 15:05:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2022-11-23 15:05:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2022-11-23 15:05:20,899 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2022-11-23 15:05:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:05:20,899 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2022-11-23 15:05:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2022-11-23 15:05:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-23 15:05:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-23 15:05:20,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:05:20,900 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:05:20,901 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 15:05:20,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 15:05:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2022-11-23 15:05:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2022-11-23 15:05:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2022-11-23 15:05:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2022-11-23 15:05:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:05:20,908 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:05:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 15:05:20,909 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 15:05:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2022-11-23 15:05:20,914 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2022-11-23 15:05:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2022-11-23 15:05:20,915 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2022-11-23 15:05:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:05:20,915 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:05:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:05:20,915 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2022-11-23 15:05:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2022-11-23 15:05:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2022-11-23 15:05:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2022-11-23 15:05:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2022-11-23 15:05:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2022-11-23 15:05:20,916 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-23 15:05:20,916 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-23 15:05:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:05:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:05:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2022-11-23 15:05:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2022-11-23 15:05:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2022-11-23 15:05:20,917 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2022-11-23 15:05:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:05:20,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2022-11-23 15:05:20,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2022-11-23 15:05:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:05:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 15:05:20,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 15:05:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:05:20,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_int_urb_17 [2022-11-23 15:05:20,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_int_urb_17 [2022-11-23 15:05:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:05:20,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 15:05:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-23 15:05:20,919 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-23 15:05:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-23 15:05:20,919 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-23 15:05:20,919 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2022-11-23 15:05:20,919 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2022-11-23 15:05:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_irq [2022-11-23 15:05:20,920 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_irq [2022-11-23 15:05:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2022-11-23 15:05:20,920 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2022-11-23 15:05:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2022-11-23 15:05:20,920 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2022-11-23 15:05:20,920 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2022-11-23 15:05:20,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2022-11-23 15:05:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 15:05:20,921 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 15:05:20,921 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-23 15:05:20,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-23 15:05:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:05:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-23 15:05:20,922 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-23 15:05:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-23 15:05:20,922 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-23 15:05:20,922 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2022-11-23 15:05:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2022-11-23 15:05:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:05:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:05:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2022-11-23 15:05:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2022-11-23 15:05:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_bulk_callback [2022-11-23 15:05:20,923 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_bulk_callback [2022-11-23 15:05:20,923 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 15:05:20,924 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 15:05:21,787 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:05:21,790 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:05:22,195 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:05:22,959 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-23 15:05:36,535 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:05:38,533 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:05:38,534 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:05:38,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:38 BoogieIcfgContainer [2022-11-23 15:05:38,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:05:38,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:05:38,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:05:38,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:05:38,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:05:17" (1/3) ... [2022-11-23 15:05:38,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6751cd02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:38, skipping insertion in model container [2022-11-23 15:05:38,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:19" (2/3) ... [2022-11-23 15:05:38,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6751cd02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:38, skipping insertion in model container [2022-11-23 15:05:38,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:38" (3/3) ... [2022-11-23 15:05:38,554 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2022-11-23 15:05:38,577 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:05:38,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:05:38,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:05:38,708 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;@516e52e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:05:38,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:05:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 1137 states, 708 states have (on average 1.3573446327683616) internal successors, (961), 744 states have internal predecessors, (961), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2022-11-23 15:05:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-23 15:05:38,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:38,757 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:38,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1187070827, now seen corresponding path program 1 times [2022-11-23 15:05:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:38,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312767259] [2022-11-23 15:05:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:05:41,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:41,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312767259] [2022-11-23 15:05:41,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312767259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:41,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:41,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:05:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142699540] [2022-11-23 15:05:41,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:41,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:05:41,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:41,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:05:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:05:41,372 INFO L87 Difference]: Start difference. First operand has 1137 states, 708 states have (on average 1.3573446327683616) internal successors, (961), 744 states have internal predecessors, (961), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:05:45,960 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 15:05:55,379 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 15:05:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:56,227 INFO L93 Difference]: Finished difference Result 4091 states and 5975 transitions. [2022-11-23 15:05:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:05:56,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 110 [2022-11-23 15:05:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:56,269 INFO L225 Difference]: With dead ends: 4091 [2022-11-23 15:05:56,269 INFO L226 Difference]: Without dead ends: 2944 [2022-11-23 15:05:56,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:05:56,283 INFO L413 NwaCegarLoop]: 2228 mSDtfsCounter, 3299 mSDsluCounter, 6498 mSDsCounter, 0 mSdLazyCounter, 4683 mSolverCounterSat, 449 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3402 SdHoareTripleChecker+Valid, 8726 SdHoareTripleChecker+Invalid, 5134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 4683 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:56,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3402 Valid, 8726 Invalid, 5134 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [449 Valid, 4683 Invalid, 2 Unknown, 0 Unchecked, 14.2s Time] [2022-11-23 15:05:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2022-11-23 15:05:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2907. [2022-11-23 15:05:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 1857 states have (on average 1.3527194399569198) internal successors, (2512), 1912 states have internal predecessors, (2512), 828 states have call successors, (828), 222 states have call predecessors, (828), 221 states have return successors, (822), 798 states have call predecessors, (822), 822 states have call successors, (822) [2022-11-23 15:05:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4162 transitions. [2022-11-23 15:05:56,581 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4162 transitions. Word has length 110 [2022-11-23 15:05:56,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:56,582 INFO L495 AbstractCegarLoop]: Abstraction has 2907 states and 4162 transitions. [2022-11-23 15:05:56,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 15:05:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4162 transitions. [2022-11-23 15:05:56,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 15:05:56,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:56,590 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:05:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:05:56,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash -94287021, now seen corresponding path program 1 times [2022-11-23 15:05:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:56,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161657077] [2022-11-23 15:05:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:05:57,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161657077] [2022-11-23 15:05:57,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161657077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:57,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:05:57,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:05:57,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361631879] [2022-11-23 15:05:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:57,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:05:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:05:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:05:57,995 INFO L87 Difference]: Start difference. First operand 2907 states and 4162 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:01,240 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 15:06:04,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:06:06,709 WARN L539 Checker$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 15:06:08,733 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 15:06:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:08,934 INFO L93 Difference]: Finished difference Result 5624 states and 8040 transitions. [2022-11-23 15:06:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2022-11-23 15:06:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:08,970 INFO L225 Difference]: With dead ends: 5624 [2022-11-23 15:06:08,971 INFO L226 Difference]: Without dead ends: 5621 [2022-11-23 15:06:08,975 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 15:06:08,976 INFO L413 NwaCegarLoop]: 1918 mSDtfsCounter, 1331 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:08,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 3280 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 460 Invalid, 3 Unknown, 0 Unchecked, 10.6s Time] [2022-11-23 15:06:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2022-11-23 15:06:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5602. [2022-11-23 15:06:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 3594 states have (on average 1.3561491374513077) internal successors, (4874), 3697 states have internal predecessors, (4874), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2022-11-23 15:06:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 8014 transitions. [2022-11-23 15:06:09,323 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 8014 transitions. Word has length 121 [2022-11-23 15:06:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:09,324 INFO L495 AbstractCegarLoop]: Abstraction has 5602 states and 8014 transitions. [2022-11-23 15:06:09,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 8014 transitions. [2022-11-23 15:06:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 15:06:09,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:09,337 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:06:09,338 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1371369677, now seen corresponding path program 1 times [2022-11-23 15:06:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:09,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593986625] [2022-11-23 15:06:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:10,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593986625] [2022-11-23 15:06:10,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593986625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:10,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:10,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:10,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53373587] [2022-11-23 15:06:10,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:10,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:10,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:10,543 INFO L87 Difference]: Start difference. First operand 5602 states and 8014 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:13,682 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 15:06:17,403 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 15:06:17,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:17,635 INFO L93 Difference]: Finished difference Result 5623 states and 8038 transitions. [2022-11-23 15:06:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:17,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2022-11-23 15:06:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:17,680 INFO L225 Difference]: With dead ends: 5623 [2022-11-23 15:06:17,680 INFO L226 Difference]: Without dead ends: 5620 [2022-11-23 15:06:17,685 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 15:06:17,690 INFO L413 NwaCegarLoop]: 1920 mSDtfsCounter, 1329 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 3284 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:17,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1329 Valid, 3284 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 455 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 15:06:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5620 states. [2022-11-23 15:06:18,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5620 to 5603. [2022-11-23 15:06:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 3595 states have (on average 1.3560500695410291) internal successors, (4875), 3698 states have internal predecessors, (4875), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2022-11-23 15:06:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8015 transitions. [2022-11-23 15:06:18,096 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8015 transitions. Word has length 122 [2022-11-23 15:06:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:18,096 INFO L495 AbstractCegarLoop]: Abstraction has 5603 states and 8015 transitions. [2022-11-23 15:06:18,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8015 transitions. [2022-11-23 15:06:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 15:06:18,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:18,102 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:18,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:06:18,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash -437908074, now seen corresponding path program 1 times [2022-11-23 15:06:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962428962] [2022-11-23 15:06:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:18,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:18,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962428962] [2022-11-23 15:06:18,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962428962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:18,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:18,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368205870] [2022-11-23 15:06:18,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:18,581 INFO L87 Difference]: Start difference. First operand 5603 states and 8015 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:21,591 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 15:06:25,335 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 15:06:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:25,569 INFO L93 Difference]: Finished difference Result 5618 states and 8031 transitions. [2022-11-23 15:06:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 123 [2022-11-23 15:06:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:25,602 INFO L225 Difference]: With dead ends: 5618 [2022-11-23 15:06:25,602 INFO L226 Difference]: Without dead ends: 5615 [2022-11-23 15:06:25,606 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 15:06:25,608 INFO L413 NwaCegarLoop]: 1920 mSDtfsCounter, 1326 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:25,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 3279 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 454 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 15:06:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2022-11-23 15:06:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 5604. [2022-11-23 15:06:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 3596 states have (on average 1.3559510567296997) internal successors, (4876), 3699 states have internal predecessors, (4876), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2022-11-23 15:06:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8016 transitions. [2022-11-23 15:06:26,011 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8016 transitions. Word has length 123 [2022-11-23 15:06:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:26,013 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8016 transitions. [2022-11-23 15:06:26,014 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8016 transitions. [2022-11-23 15:06:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 15:06:26,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:26,018 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:06:26,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash -690938640, now seen corresponding path program 1 times [2022-11-23 15:06:26,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:26,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206591735] [2022-11-23 15:06:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:26,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:26,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206591735] [2022-11-23 15:06:26,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206591735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:26,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:26,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:26,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921564782] [2022-11-23 15:06:26,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:26,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:26,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:26,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:26,488 INFO L87 Difference]: Start difference. First operand 5604 states and 8016 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:29,832 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 15:06:33,120 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 15:06:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:33,362 INFO L93 Difference]: Finished difference Result 8177 states and 11753 transitions. [2022-11-23 15:06:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 124 [2022-11-23 15:06:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:33,418 INFO L225 Difference]: With dead ends: 8177 [2022-11-23 15:06:33,418 INFO L226 Difference]: Without dead ends: 8174 [2022-11-23 15:06:33,424 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 15:06:33,425 INFO L413 NwaCegarLoop]: 1898 mSDtfsCounter, 1252 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:33,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 3283 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 461 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-23 15:06:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8174 states. [2022-11-23 15:06:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8174 to 8155. [2022-11-23 15:06:33,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8155 states, 5243 states have (on average 1.3593362578676331) internal successors, (7127), 5400 states have internal predecessors, (7127), 2270 states have call successors, (2270), 645 states have call predecessors, (2270), 641 states have return successors, (2333), 2183 states have call predecessors, (2333), 2264 states have call successors, (2333) [2022-11-23 15:06:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8155 states to 8155 states and 11730 transitions. [2022-11-23 15:06:33,971 INFO L78 Accepts]: Start accepts. Automaton has 8155 states and 11730 transitions. Word has length 124 [2022-11-23 15:06:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:33,975 INFO L495 AbstractCegarLoop]: Abstraction has 8155 states and 11730 transitions. [2022-11-23 15:06:33,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8155 states and 11730 transitions. [2022-11-23 15:06:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 15:06:33,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:33,979 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:33,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:06:33,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash 55053273, now seen corresponding path program 1 times [2022-11-23 15:06:33,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:33,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657054837] [2022-11-23 15:06:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:33,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:34,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:34,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657054837] [2022-11-23 15:06:34,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657054837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:34,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:34,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:34,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215568354] [2022-11-23 15:06:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:34,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:34,486 INFO L87 Difference]: Start difference. First operand 8155 states and 11730 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:37,220 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 15:06:40,962 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 15:06:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:41,177 INFO L93 Difference]: Finished difference Result 8172 states and 11748 transitions. [2022-11-23 15:06:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 125 [2022-11-23 15:06:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:41,213 INFO L225 Difference]: With dead ends: 8172 [2022-11-23 15:06:41,213 INFO L226 Difference]: Without dead ends: 8155 [2022-11-23 15:06:41,218 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 15:06:41,219 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 1322 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:41,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 3214 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 444 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-23 15:06:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2022-11-23 15:06:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 8143. [2022-11-23 15:06:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8143 states, 5235 states have (on average 1.3593123209169053) internal successors, (7116), 5392 states have internal predecessors, (7116), 2268 states have call successors, (2268), 643 states have call predecessors, (2268), 639 states have return successors, (2331), 2181 states have call predecessors, (2331), 2262 states have call successors, (2331) [2022-11-23 15:06:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8143 states to 8143 states and 11715 transitions. [2022-11-23 15:06:41,847 INFO L78 Accepts]: Start accepts. Automaton has 8143 states and 11715 transitions. Word has length 125 [2022-11-23 15:06:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:41,847 INFO L495 AbstractCegarLoop]: Abstraction has 8143 states and 11715 transitions. [2022-11-23 15:06:41,847 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), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 15:06:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8143 states and 11715 transitions. [2022-11-23 15:06:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 15:06:41,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:41,852 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:06:41,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1622383090, now seen corresponding path program 1 times [2022-11-23 15:06:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:41,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197274390] [2022-11-23 15:06:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:43,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:43,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197274390] [2022-11-23 15:06:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197274390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:43,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:43,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:43,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517608001] [2022-11-23 15:06:43,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:43,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:43,042 INFO L87 Difference]: Start difference. First operand 8143 states and 11715 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:06:46,168 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 15:06:48,723 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 15:06:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:49,945 INFO L93 Difference]: Finished difference Result 10872 states and 15612 transitions. [2022-11-23 15:06:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2022-11-23 15:06:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:49,988 INFO L225 Difference]: With dead ends: 10872 [2022-11-23 15:06:49,989 INFO L226 Difference]: Without dead ends: 10869 [2022-11-23 15:06:49,993 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 15:06:49,994 INFO L413 NwaCegarLoop]: 1680 mSDtfsCounter, 1345 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:49,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1345 Valid, 3042 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-23 15:06:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10869 states. [2022-11-23 15:06:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 10850. [2022-11-23 15:06:50,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10850 states, 6980 states have (on average 1.3594555873925502) internal successors, (9489), 7185 states have internal predecessors, (9489), 3017 states have call successors, (3017), 856 states have call predecessors, (3017), 852 states have return successors, (3080), 2906 states have call predecessors, (3080), 3011 states have call successors, (3080) [2022-11-23 15:06:50,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10850 states to 10850 states and 15586 transitions. [2022-11-23 15:06:50,560 INFO L78 Accepts]: Start accepts. Automaton has 10850 states and 15586 transitions. Word has length 126 [2022-11-23 15:06:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:50,561 INFO L495 AbstractCegarLoop]: Abstraction has 10850 states and 15586 transitions. [2022-11-23 15:06:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:06:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 10850 states and 15586 transitions. [2022-11-23 15:06:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 15:06:50,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:50,566 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:50,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:06:50,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1245031794, now seen corresponding path program 1 times [2022-11-23 15:06:50,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:50,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388018482] [2022-11-23 15:06:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:50,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:51,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:51,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388018482] [2022-11-23 15:06:51,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388018482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:51,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:51,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:51,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557902739] [2022-11-23 15:06:51,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:51,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:51,765 INFO L87 Difference]: Start difference. First operand 10850 states and 15586 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:06:55,109 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 15:06:57,685 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 15:06:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:58,722 INFO L93 Difference]: Finished difference Result 10871 states and 15610 transitions. [2022-11-23 15:06:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:06:58,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 127 [2022-11-23 15:06:58,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:58,776 INFO L225 Difference]: With dead ends: 10871 [2022-11-23 15:06:58,777 INFO L226 Difference]: Without dead ends: 10868 [2022-11-23 15:06:58,785 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 15:06:58,785 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 1343 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 3046 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:58,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 3046 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 401 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-23 15:06:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10868 states. [2022-11-23 15:06:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10868 to 10851. [2022-11-23 15:06:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10851 states, 6981 states have (on average 1.3594040968342644) internal successors, (9490), 7186 states have internal predecessors, (9490), 3017 states have call successors, (3017), 856 states have call predecessors, (3017), 852 states have return successors, (3080), 2906 states have call predecessors, (3080), 3011 states have call successors, (3080) [2022-11-23 15:06:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10851 states to 10851 states and 15587 transitions. [2022-11-23 15:06:59,341 INFO L78 Accepts]: Start accepts. Automaton has 10851 states and 15587 transitions. Word has length 127 [2022-11-23 15:06:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:59,341 INFO L495 AbstractCegarLoop]: Abstraction has 10851 states and 15587 transitions. [2022-11-23 15:06:59,341 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), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:06:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 10851 states and 15587 transitions. [2022-11-23 15:06:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 15:06:59,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:59,346 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:06:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:06:59,347 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -59415151, now seen corresponding path program 1 times [2022-11-23 15:06:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:59,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438943029] [2022-11-23 15:06:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:06:59,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438943029] [2022-11-23 15:06:59,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438943029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:59,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:06:59,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:06:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172875085] [2022-11-23 15:06:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:06:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:06:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:06:59,949 INFO L87 Difference]: Start difference. First operand 10851 states and 15587 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:07:03,377 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 15:07:05,940 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 15:07:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:07,276 INFO L93 Difference]: Finished difference Result 10866 states and 15603 transitions. [2022-11-23 15:07:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 128 [2022-11-23 15:07:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:07,331 INFO L225 Difference]: With dead ends: 10866 [2022-11-23 15:07:07,331 INFO L226 Difference]: Without dead ends: 10863 [2022-11-23 15:07:07,339 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 15:07:07,340 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 1340 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:07,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 3041 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-23 15:07:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2022-11-23 15:07:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 10852. [2022-11-23 15:07:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 6982 states have (on average 1.359352621025494) internal successors, (9491), 7187 states have internal predecessors, (9491), 3017 states have call successors, (3017), 856 states have call predecessors, (3017), 852 states have return successors, (3080), 2906 states have call predecessors, (3080), 3011 states have call successors, (3080) [2022-11-23 15:07:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 15588 transitions. [2022-11-23 15:07:08,073 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 15588 transitions. Word has length 128 [2022-11-23 15:07:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:08,074 INFO L495 AbstractCegarLoop]: Abstraction has 10852 states and 15588 transitions. [2022-11-23 15:07:08,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:07:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 15588 transitions. [2022-11-23 15:07:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-23 15:07:08,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:08,080 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:08,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:07:08,080 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1842559915, now seen corresponding path program 1 times [2022-11-23 15:07:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:08,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796501843] [2022-11-23 15:07:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:08,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:07:08,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796501843] [2022-11-23 15:07:08,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796501843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:08,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:07:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546662136] [2022-11-23 15:07:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:08,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:07:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:07:08,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:07:08,624 INFO L87 Difference]: Start difference. First operand 10852 states and 15588 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:07:11,981 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 15:07:15,026 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 15:07:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:15,307 INFO L93 Difference]: Finished difference Result 13446 states and 19353 transitions. [2022-11-23 15:07:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 129 [2022-11-23 15:07:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:15,369 INFO L225 Difference]: With dead ends: 13446 [2022-11-23 15:07:15,369 INFO L226 Difference]: Without dead ends: 13443 [2022-11-23 15:07:15,379 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 15:07:15,380 INFO L413 NwaCegarLoop]: 1747 mSDtfsCounter, 1266 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 3132 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:15,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 3132 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 419 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 15:07:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13443 states. [2022-11-23 15:07:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13443 to 13415. [2022-11-23 15:07:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13415 states, 8637 states have (on average 1.3607734166956118) internal successors, (11753), 8896 states have internal predecessors, (11753), 3718 states have call successors, (3718), 1066 states have call predecessors, (3718), 1059 states have return successors, (3850), 3574 states have call predecessors, (3850), 3712 states have call successors, (3850) [2022-11-23 15:07:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13415 states to 13415 states and 19321 transitions. [2022-11-23 15:07:16,259 INFO L78 Accepts]: Start accepts. Automaton has 13415 states and 19321 transitions. Word has length 129 [2022-11-23 15:07:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:16,260 INFO L495 AbstractCegarLoop]: Abstraction has 13415 states and 19321 transitions. [2022-11-23 15:07:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:07:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 13415 states and 19321 transitions. [2022-11-23 15:07:16,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 15:07:16,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:16,265 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:16,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:07:16,266 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1285467884, now seen corresponding path program 1 times [2022-11-23 15:07:16,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:16,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413253660] [2022-11-23 15:07:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:16,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-11-23 15:07:16,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:16,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413253660] [2022-11-23 15:07:16,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413253660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:16,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:16,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:07:16,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760776067] [2022-11-23 15:07:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:16,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:07:16,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:07:16,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:07:16,732 INFO L87 Difference]: Start difference. First operand 13415 states and 19321 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:07:19,703 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 15:07:22,433 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 15:07:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:23,371 INFO L93 Difference]: Finished difference Result 13432 states and 19339 transitions. [2022-11-23 15:07:23,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:23,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 130 [2022-11-23 15:07:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:23,419 INFO L225 Difference]: With dead ends: 13432 [2022-11-23 15:07:23,419 INFO L226 Difference]: Without dead ends: 13419 [2022-11-23 15:07:23,429 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 15:07:23,430 INFO L413 NwaCegarLoop]: 1683 mSDtfsCounter, 1336 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:23,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 3048 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 399 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-11-23 15:07:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13419 states. [2022-11-23 15:07:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13419 to 13401. [2022-11-23 15:07:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13401 states, 8625 states have (on average 1.360927536231884) internal successors, (11738), 8885 states have internal predecessors, (11738), 3716 states have call successors, (3716), 1066 states have call predecessors, (3716), 1059 states have return successors, (3848), 3571 states have call predecessors, (3848), 3710 states have call successors, (3848) [2022-11-23 15:07:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13401 states to 13401 states and 19302 transitions. [2022-11-23 15:07:24,347 INFO L78 Accepts]: Start accepts. Automaton has 13401 states and 19302 transitions. Word has length 130 [2022-11-23 15:07:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:24,348 INFO L495 AbstractCegarLoop]: Abstraction has 13401 states and 19302 transitions. [2022-11-23 15:07:24,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 15:07:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 13401 states and 19302 transitions. [2022-11-23 15:07:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-23 15:07:24,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:24,352 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:24,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:07:24,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 853714150, now seen corresponding path program 1 times [2022-11-23 15:07:24,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:24,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073770159] [2022-11-23 15:07:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:24,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-23 15:07:24,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073770159] [2022-11-23 15:07:24,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073770159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:24,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:24,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:07:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533979017] [2022-11-23 15:07:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:24,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:07:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:07:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:07:24,742 INFO L87 Difference]: Start difference. First operand 13401 states and 19302 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:07:27,855 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 15:07:32,032 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 15:07:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:32,395 INFO L93 Difference]: Finished difference Result 39296 states and 56507 transitions. [2022-11-23 15:07:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:32,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 144 [2022-11-23 15:07:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:32,493 INFO L225 Difference]: With dead ends: 39296 [2022-11-23 15:07:32,493 INFO L226 Difference]: Without dead ends: 25935 [2022-11-23 15:07:32,550 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 15:07:32,551 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 1287 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 3176 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:32,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 3176 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-23 15:07:32,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25935 states. [2022-11-23 15:07:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25935 to 25892. [2022-11-23 15:07:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25892 states, 16674 states have (on average 1.3614009835672305) internal successors, (22700), 17181 states have internal predecessors, (22700), 7118 states have call successors, (7118), 2112 states have call predecessors, (7118), 2099 states have return successors, (7382), 6840 states have call predecessors, (7382), 7112 states have call successors, (7382) [2022-11-23 15:07:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25892 states to 25892 states and 37200 transitions. [2022-11-23 15:07:34,239 INFO L78 Accepts]: Start accepts. Automaton has 25892 states and 37200 transitions. Word has length 144 [2022-11-23 15:07:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:34,239 INFO L495 AbstractCegarLoop]: Abstraction has 25892 states and 37200 transitions. [2022-11-23 15:07:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-23 15:07:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 25892 states and 37200 transitions. [2022-11-23 15:07:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-23 15:07:34,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:34,270 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:07:34,271 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1524650767, now seen corresponding path program 1 times [2022-11-23 15:07:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475001181] [2022-11-23 15:07:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:34,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-11-23 15:07:34,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475001181] [2022-11-23 15:07:34,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475001181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:34,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:07:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818552705] [2022-11-23 15:07:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:34,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:07:34,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:07:34,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:07:34,859 INFO L87 Difference]: Start difference. First operand 25892 states and 37200 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:07:38,200 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 15:07:41,314 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 15:07:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:41,827 INFO L93 Difference]: Finished difference Result 45071 states and 64709 transitions. [2022-11-23 15:07:41,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:41,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 172 [2022-11-23 15:07:41,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:41,884 INFO L225 Difference]: With dead ends: 45071 [2022-11-23 15:07:41,884 INFO L226 Difference]: Without dead ends: 19214 [2022-11-23 15:07:41,964 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 15:07:41,965 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 17 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:41,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2824 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 398 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 15:07:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19214 states. [2022-11-23 15:07:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19214 to 19104. [2022-11-23 15:07:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19104 states, 12278 states have (on average 1.3602378237497963) internal successors, (16701), 12654 states have internal predecessors, (16701), 5260 states have call successors, (5260), 1575 states have call predecessors, (5260), 1565 states have return successors, (5456), 5052 states have call predecessors, (5456), 5254 states have call successors, (5456) [2022-11-23 15:07:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19104 states to 19104 states and 27417 transitions. [2022-11-23 15:07:43,228 INFO L78 Accepts]: Start accepts. Automaton has 19104 states and 27417 transitions. Word has length 172 [2022-11-23 15:07:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:43,229 INFO L495 AbstractCegarLoop]: Abstraction has 19104 states and 27417 transitions. [2022-11-23 15:07:43,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:07:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 19104 states and 27417 transitions. [2022-11-23 15:07:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 15:07:43,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:43,255 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:07:43,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:43,256 INFO L85 PathProgramCache]: Analyzing trace with hash -796346154, now seen corresponding path program 1 times [2022-11-23 15:07:43,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:43,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740413653] [2022-11-23 15:07:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-11-23 15:07:43,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:43,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740413653] [2022-11-23 15:07:43,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740413653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:43,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:43,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:07:43,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125213983] [2022-11-23 15:07:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:07:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:07:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:07:43,632 INFO L87 Difference]: Start difference. First operand 19104 states and 27417 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:07:46,230 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 15:07:51,505 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 15:07:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:52,016 INFO L93 Difference]: Finished difference Result 49843 states and 71090 transitions. [2022-11-23 15:07:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:07:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 188 [2022-11-23 15:07:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:52,255 INFO L225 Difference]: With dead ends: 49843 [2022-11-23 15:07:52,255 INFO L226 Difference]: Without dead ends: 30779 [2022-11-23 15:07:52,297 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 15:07:52,298 INFO L413 NwaCegarLoop]: 1698 mSDtfsCounter, 993 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 2983 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:52,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 2983 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 498 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 15:07:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30779 states. [2022-11-23 15:07:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30779 to 30675. [2022-11-23 15:07:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30675 states, 19605 states have (on average 1.3513389441469013) internal successors, (26493), 20296 states have internal predecessors, (26493), 8376 states have call successors, (8376), 2711 states have call predecessors, (8376), 2693 states have return successors, (8725), 7983 states have call predecessors, (8725), 8370 states have call successors, (8725) [2022-11-23 15:07:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30675 states to 30675 states and 43594 transitions. [2022-11-23 15:07:54,067 INFO L78 Accepts]: Start accepts. Automaton has 30675 states and 43594 transitions. Word has length 188 [2022-11-23 15:07:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:54,068 INFO L495 AbstractCegarLoop]: Abstraction has 30675 states and 43594 transitions. [2022-11-23 15:07:54,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 15:07:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 30675 states and 43594 transitions. [2022-11-23 15:07:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-23 15:07:54,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:54,105 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:07:54,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 15:07:54,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1138213420, now seen corresponding path program 1 times [2022-11-23 15:07:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305086451] [2022-11-23 15:07:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:54,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-23 15:07:54,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:54,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305086451] [2022-11-23 15:07:54,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305086451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:07:54,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:07:54,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:07:54,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686231169] [2022-11-23 15:07:54,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:07:54,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:07:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:54,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:07:54,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:07:54,882 INFO L87 Difference]: Start difference. First operand 30675 states and 43594 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:07:57,150 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 15:08:01,536 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 15:08:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:02,164 INFO L93 Difference]: Finished difference Result 48570 states and 68978 transitions. [2022-11-23 15:08:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:08:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 189 [2022-11-23 15:08:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:02,232 INFO L225 Difference]: With dead ends: 48570 [2022-11-23 15:08:02,232 INFO L226 Difference]: Without dead ends: 19045 [2022-11-23 15:08:02,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:08:02,302 INFO L413 NwaCegarLoop]: 1423 mSDtfsCounter, 26 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4238 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:02,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 4238 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 604 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 15:08:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19045 states. [2022-11-23 15:08:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19045 to 18949. [2022-11-23 15:08:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18949 states, 12108 states have (on average 1.3502642880740006) internal successors, (16349), 12534 states have internal predecessors, (16349), 5179 states have call successors, (5179), 1671 states have call predecessors, (5179), 1661 states have return successors, (5360), 4939 states have call predecessors, (5360), 5173 states have call successors, (5360) [2022-11-23 15:08:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18949 states to 18949 states and 26888 transitions. [2022-11-23 15:08:03,596 INFO L78 Accepts]: Start accepts. Automaton has 18949 states and 26888 transitions. Word has length 189 [2022-11-23 15:08:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:03,597 INFO L495 AbstractCegarLoop]: Abstraction has 18949 states and 26888 transitions. [2022-11-23 15:08:03,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:08:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 18949 states and 26888 transitions. [2022-11-23 15:08:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-23 15:08:03,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:03,608 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:03,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:08:03,608 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1159774595, now seen corresponding path program 1 times [2022-11-23 15:08:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486970353] [2022-11-23 15:08:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:03,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-11-23 15:08:04,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486970353] [2022-11-23 15:08:04,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486970353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:04,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:04,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:08:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392099540] [2022-11-23 15:08:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:04,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:04,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:08:04,067 INFO L87 Difference]: Start difference. First operand 18949 states and 26888 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 15:08:06,669 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 15:08:12,125 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 15:08:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:12,885 INFO L93 Difference]: Finished difference Result 47078 states and 66511 transitions. [2022-11-23 15:08:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 189 [2022-11-23 15:08:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:12,984 INFO L225 Difference]: With dead ends: 47078 [2022-11-23 15:08:12,984 INFO L226 Difference]: Without dead ends: 28180 [2022-11-23 15:08:13,030 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 15:08:13,031 INFO L413 NwaCegarLoop]: 2152 mSDtfsCounter, 1058 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3496 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:13,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 3496 Invalid, 517 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 15:08:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28180 states. [2022-11-23 15:08:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28180 to 28006. [2022-11-23 15:08:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28006 states, 17910 states have (on average 1.3447236180904523) internal successors, (24084), 18511 states have internal predecessors, (24084), 7566 states have call successors, (7566), 2544 states have call predecessors, (7566), 2529 states have return successors, (7800), 7204 states have call predecessors, (7800), 7560 states have call successors, (7800) [2022-11-23 15:08:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28006 states to 28006 states and 39450 transitions. [2022-11-23 15:08:14,567 INFO L78 Accepts]: Start accepts. Automaton has 28006 states and 39450 transitions. Word has length 189 [2022-11-23 15:08:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:14,568 INFO L495 AbstractCegarLoop]: Abstraction has 28006 states and 39450 transitions. [2022-11-23 15:08:14,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-23 15:08:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28006 states and 39450 transitions. [2022-11-23 15:08:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-23 15:08:14,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:14,585 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:14,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:08:14,585 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 58694480, now seen corresponding path program 1 times [2022-11-23 15:08:14,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:14,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31678039] [2022-11-23 15:08:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:14,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-11-23 15:08:18,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:18,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31678039] [2022-11-23 15:08:18,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31678039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:18,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:18,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:08:18,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686257644] [2022-11-23 15:08:18,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:18,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:08:18,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:18,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:08:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:18,387 INFO L87 Difference]: Start difference. First operand 28006 states and 39450 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 15:08:20,994 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 15:08:27,107 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 15:08:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:27,775 INFO L93 Difference]: Finished difference Result 56060 states and 79014 transitions. [2022-11-23 15:08:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:08:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 190 [2022-11-23 15:08:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:27,876 INFO L225 Difference]: With dead ends: 56060 [2022-11-23 15:08:27,876 INFO L226 Difference]: Without dead ends: 28143 [2022-11-23 15:08:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:08:27,929 INFO L413 NwaCegarLoop]: 1440 mSDtfsCounter, 188 mSDsluCounter, 5657 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 7097 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:27,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 7097 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1007 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-11-23 15:08:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28143 states. [2022-11-23 15:08:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28143 to 28018. [2022-11-23 15:08:29,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28018 states, 17918 states have (on average 1.3445138966402501) internal successors, (24091), 18519 states have internal predecessors, (24091), 7568 states have call successors, (7568), 2544 states have call predecessors, (7568), 2531 states have return successors, (7804), 7208 states have call predecessors, (7804), 7562 states have call successors, (7804) [2022-11-23 15:08:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28018 states to 28018 states and 39463 transitions. [2022-11-23 15:08:29,606 INFO L78 Accepts]: Start accepts. Automaton has 28018 states and 39463 transitions. Word has length 190 [2022-11-23 15:08:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:29,607 INFO L495 AbstractCegarLoop]: Abstraction has 28018 states and 39463 transitions. [2022-11-23 15:08:29,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 15:08:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28018 states and 39463 transitions. [2022-11-23 15:08:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-23 15:08:29,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:29,620 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:29,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:08:29,621 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1174308317, now seen corresponding path program 1 times [2022-11-23 15:08:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212287015] [2022-11-23 15:08:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2022-11-23 15:08:33,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212287015] [2022-11-23 15:08:33,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212287015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:33,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:33,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 15:08:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399491125] [2022-11-23 15:08:33,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:33,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:08:33,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:08:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:08:33,487 INFO L87 Difference]: Start difference. First operand 28018 states and 39463 transitions. Second operand has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) [2022-11-23 15:08:37,233 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 15:08:53,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:08:59,746 WARN L539 Checker$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 15:09:02,209 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 15:09:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:05,220 INFO L93 Difference]: Finished difference Result 41623 states and 60674 transitions. [2022-11-23 15:09:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:09:05,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) Word has length 205 [2022-11-23 15:09:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:05,347 INFO L225 Difference]: With dead ends: 41623 [2022-11-23 15:09:05,347 INFO L226 Difference]: Without dead ends: 41620 [2022-11-23 15:09:05,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:09:05,363 INFO L413 NwaCegarLoop]: 1767 mSDtfsCounter, 3229 mSDsluCounter, 6335 mSDsCounter, 0 mSdLazyCounter, 10235 mSolverCounterSat, 2033 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3535 SdHoareTripleChecker+Valid, 8102 SdHoareTripleChecker+Invalid, 12272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2033 IncrementalHoareTripleChecker+Valid, 10235 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:05,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3535 Valid, 8102 Invalid, 12272 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2033 Valid, 10235 Invalid, 4 Unknown, 0 Unchecked, 28.7s Time] [2022-11-23 15:09:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41620 states. [2022-11-23 15:09:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41620 to 31866. [2022-11-23 15:09:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31866 states, 20186 states have (on average 1.3289903893787773) internal successors, (26827), 20939 states have internal predecessors, (26827), 8532 states have call successors, (8532), 2936 states have call predecessors, (8532), 3147 states have return successors, (9254), 8288 states have call predecessors, (9254), 8526 states have call successors, (9254) [2022-11-23 15:09:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31866 states to 31866 states and 44613 transitions. [2022-11-23 15:09:07,468 INFO L78 Accepts]: Start accepts. Automaton has 31866 states and 44613 transitions. Word has length 205 [2022-11-23 15:09:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:07,468 INFO L495 AbstractCegarLoop]: Abstraction has 31866 states and 44613 transitions. [2022-11-23 15:09:07,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) [2022-11-23 15:09:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31866 states and 44613 transitions. [2022-11-23 15:09:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-23 15:09:07,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:07,480 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 15:09:07,480 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:07,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1735853852, now seen corresponding path program 1 times [2022-11-23 15:09:07,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:07,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000430774] [2022-11-23 15:09:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-23 15:09:08,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000430774] [2022-11-23 15:09:08,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000430774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:08,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:08,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:09:08,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411319100] [2022-11-23 15:09:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:08,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:09:08,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:09:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:09:08,419 INFO L87 Difference]: Start difference. First operand 31866 states and 44613 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-11-23 15:09:11,176 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 15:09:17,261 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 15:09:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:18,089 INFO L93 Difference]: Finished difference Result 77124 states and 108122 transitions. [2022-11-23 15:09:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:09:18,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 209 [2022-11-23 15:09:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:18,233 INFO L225 Difference]: With dead ends: 77124 [2022-11-23 15:09:18,233 INFO L226 Difference]: Without dead ends: 45358 [2022-11-23 15:09:18,305 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 15:09:18,306 INFO L413 NwaCegarLoop]: 1796 mSDtfsCounter, 1311 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 3133 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:18,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1311 Valid, 3133 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 426 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-23 15:09:18,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45358 states. [2022-11-23 15:09:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45358 to 45221. [2022-11-23 15:09:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45221 states, 28821 states have (on average 1.333853787169078) internal successors, (38443), 29866 states have internal predecessors, (38443), 11989 states have call successors, (11989), 4133 states have call predecessors, (11989), 4410 states have return successors, (12963), 11649 states have call predecessors, (12963), 11983 states have call successors, (12963) [2022-11-23 15:09:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45221 states to 45221 states and 63395 transitions. [2022-11-23 15:09:21,190 INFO L78 Accepts]: Start accepts. Automaton has 45221 states and 63395 transitions. Word has length 209 [2022-11-23 15:09:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:21,191 INFO L495 AbstractCegarLoop]: Abstraction has 45221 states and 63395 transitions. [2022-11-23 15:09:21,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2022-11-23 15:09:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45221 states and 63395 transitions. [2022-11-23 15:09:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-23 15:09:21,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:21,213 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 15:09:21,214 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash 751743551, now seen corresponding path program 1 times [2022-11-23 15:09:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:21,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772917621] [2022-11-23 15:09:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-11-23 15:09:22,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772917621] [2022-11-23 15:09:22,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772917621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:22,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:22,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:09:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902668769] [2022-11-23 15:09:22,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:09:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:09:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:09:22,494 INFO L87 Difference]: Start difference. First operand 45221 states and 63395 transitions. Second operand has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:09:24,773 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 15:09:30,607 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 15:09:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:31,722 INFO L93 Difference]: Finished difference Result 90466 states and 126835 transitions. [2022-11-23 15:09:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:09:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 212 [2022-11-23 15:09:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:31,891 INFO L225 Difference]: With dead ends: 90466 [2022-11-23 15:09:31,891 INFO L226 Difference]: Without dead ends: 45294 [2022-11-23 15:09:31,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:09:31,986 INFO L413 NwaCegarLoop]: 1409 mSDtfsCounter, 5 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:31,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4222 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 602 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-23 15:09:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45294 states. [2022-11-23 15:09:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45294 to 45222. [2022-11-23 15:09:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45222 states, 28822 states have (on average 1.333842203872042) internal successors, (38444), 29867 states have internal predecessors, (38444), 11989 states have call successors, (11989), 4133 states have call predecessors, (11989), 4410 states have return successors, (12963), 11649 states have call predecessors, (12963), 11983 states have call successors, (12963) [2022-11-23 15:09:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45222 states to 45222 states and 63396 transitions. [2022-11-23 15:09:35,399 INFO L78 Accepts]: Start accepts. Automaton has 45222 states and 63396 transitions. Word has length 212 [2022-11-23 15:09:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:35,400 INFO L495 AbstractCegarLoop]: Abstraction has 45222 states and 63396 transitions. [2022-11-23 15:09:35,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:09:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 45222 states and 63396 transitions. [2022-11-23 15:09:35,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-23 15:09:35,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:35,423 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:35,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 15:09:35,424 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash 512747196, now seen corresponding path program 1 times [2022-11-23 15:09:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:35,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213907167] [2022-11-23 15:09:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:35,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-11-23 15:09:37,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:37,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213907167] [2022-11-23 15:09:37,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213907167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:37,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161471367] [2022-11-23 15:09:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:37,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:37,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:09:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 6675 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:09:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-23 15:09:39,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:09:39,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161471367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:39,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:09:39,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-23 15:09:39,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599120725] [2022-11-23 15:09:39,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:39,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:09:39,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:09:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:09:39,874 INFO L87 Difference]: Start difference. First operand 45222 states and 63396 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-23 15:09:42,268 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 15:09:48,933 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 15:09:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:49,963 INFO L93 Difference]: Finished difference Result 90403 states and 126726 transitions. [2022-11-23 15:09:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:09:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 213 [2022-11-23 15:09:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:50,132 INFO L225 Difference]: With dead ends: 90403 [2022-11-23 15:09:50,132 INFO L226 Difference]: Without dead ends: 45270 [2022-11-23 15:09:50,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:09:50,222 INFO L413 NwaCegarLoop]: 1436 mSDtfsCounter, 59 mSDsluCounter, 4246 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 5682 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:50,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 5682 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 809 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 15:09:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45270 states. [2022-11-23 15:09:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45270 to 45212. [2022-11-23 15:09:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45212 states, 28817 states have (on average 1.3338307249193184) internal successors, (38437), 29862 states have internal predecessors, (38437), 11986 states have call successors, (11986), 4131 states have call predecessors, (11986), 4408 states have return successors, (12960), 11646 states have call predecessors, (12960), 11980 states have call successors, (12960) [2022-11-23 15:09:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45212 states to 45212 states and 63383 transitions. [2022-11-23 15:09:53,255 INFO L78 Accepts]: Start accepts. Automaton has 45212 states and 63383 transitions. Word has length 213 [2022-11-23 15:09:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:53,256 INFO L495 AbstractCegarLoop]: Abstraction has 45212 states and 63383 transitions. [2022-11-23 15:09:53,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-23 15:09:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 45212 states and 63383 transitions. [2022-11-23 15:09:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-23 15:09:53,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:53,280 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:09:53,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 15:09:53,501 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash -42290834, now seen corresponding path program 1 times [2022-11-23 15:09:53,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:53,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391590009] [2022-11-23 15:09:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:53,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2022-11-23 15:09:55,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391590009] [2022-11-23 15:09:55,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391590009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803191646] [2022-11-23 15:09:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:55,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:55,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:55,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:55,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6394114b-7852-4c4e-b3f0-855ce3b61d73/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:09:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 6765 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:09:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-11-23 15:09:58,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:09:58,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803191646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:58,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:09:58,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2022-11-23 15:09:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140743068] [2022-11-23 15:09:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:09:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:09:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:09:58,096 INFO L87 Difference]: Start difference. First operand 45212 states and 63383 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 15:10:01,130 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 []