./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.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_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/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_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/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_190d6354-065c-45e1-a1c6-ec9153a710d2/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 eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d --- 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 14:13:45,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:13:45,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:13:45,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:13:45,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:13:45,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:13:45,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:13:45,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:13:45,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:13:45,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:13:45,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:13:45,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:13:45,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:13:45,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:13:45,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:13:45,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:13:45,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:13:45,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:13:45,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:13:45,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:13:45,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:13:45,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:13:45,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:13:45,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:13:45,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:13:45,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:13:45,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:13:45,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:13:45,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:13:45,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:13:45,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:13:45,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:13:45,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:13:45,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:13:45,983 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:13:45,983 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:13:45,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:13:45,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:13:45,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:13:45,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:13:45,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:13:45,987 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:13:46,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:13:46,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:13:46,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:13:46,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:13:46,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:13:46,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:13:46,029 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:13:46,029 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:13:46,029 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:13:46,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:13:46,031 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:13:46,031 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:13:46,031 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:13:46,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:13:46,031 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:13:46,032 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:13:46,032 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:13:46,032 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:13:46,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:13:46,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:13:46,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:13:46,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:13:46,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:13:46,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:13:46,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:13:46,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:13:46,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:13:46,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:13:46,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:13:46,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:13:46,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:13:46,036 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:13:46,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:13:46,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:13:46,037 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:13:46,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:13:46,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:13:46,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:13:46,038 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_190d6354-065c-45e1-a1c6-ec9153a710d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d [2022-11-23 14:13:46,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:13:46,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:13:46,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:13:46,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:13:46,405 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:13:46,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-23 14:13:49,425 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:13:50,119 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:13:50,121 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-23 14:13:50,192 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/data/6e9a4bf30/9aa3e2fa34b24c28b8b2a92f7e1c3b90/FLAG0bfa83239 [2022-11-23 14:13:50,210 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/data/6e9a4bf30/9aa3e2fa34b24c28b8b2a92f7e1c3b90 [2022-11-23 14:13:50,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:13:50,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:13:50,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:13:50,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:13:50,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:13:50,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:50" (1/1) ... [2022-11-23 14:13:50,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1214c930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:50, skipping insertion in model container [2022-11-23 14:13:50,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:13:50" (1/1) ... [2022-11-23 14:13:50,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:13:50,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:13:52,719 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_190d6354-065c-45e1-a1c6-ec9153a710d2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i[342799,342812] [2022-11-23 14:13:52,775 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-23 14:13:52,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:13:52,833 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:13:53,431 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_190d6354-065c-45e1-a1c6-ec9153a710d2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i[342799,342812] [2022-11-23 14:13:53,445 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-23 14:13:53,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:13:53,593 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:13:53,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53 WrapperNode [2022-11-23 14:13:53,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:13:53,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:13:53,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:13:53,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:13:53,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:53,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,100 INFO L138 Inliner]: procedures = 266, calls = 4421, calls flagged for inlining = 129, calls inlined = 122, statements flattened = 9626 [2022-11-23 14:13:54,100 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:13:54,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:13:54,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:13:54,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:13:54,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:13:54,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:13:54,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:13:54,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:13:54,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (1/1) ... [2022-11-23 14:13:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:13:54,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:54,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:13:54,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:13:54,710 INFO L130 BoogieDeclarations]: Found specification of procedure __scsi_print_sense [2022-11-23 14:13:54,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __scsi_print_sense [2022-11-23 14:13:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-23 14:13:54,711 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-23 14:13:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-23 14:13:54,711 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2022-11-23 14:13:54,712 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2022-11-23 14:13:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:13:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:13:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2022-11-23 14:13:54,713 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2022-11-23 14:13:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:13:54,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:13:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 14:13:54,713 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 14:13:54,713 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2022-11-23 14:13:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2022-11-23 14:13:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-23 14:13:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-23 14:13:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2022-11-23 14:13:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2022-11-23 14:13:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-23 14:13:54,715 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-23 14:13:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-23 14:13:54,716 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-23 14:13:54,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:13:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:13:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2022-11-23 14:13:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2022-11-23 14:13:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2022-11-23 14:13:54,718 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2022-11-23 14:13:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 14:13:54,718 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 14:13:54,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:13:54,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:13:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2022-11-23 14:13:54,719 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2022-11-23 14:13:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 14:13:54,719 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 14:13:54,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:13:54,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:13:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2022-11-23 14:13:54,720 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2022-11-23 14:13:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2022-11-23 14:13:54,720 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2022-11-23 14:13:54,720 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2022-11-23 14:13:54,720 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2022-11-23 14:13:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2022-11-23 14:13:54,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2022-11-23 14:13:54,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:13:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_read [2022-11-23 14:13:54,722 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_read [2022-11-23 14:13:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2022-11-23 14:13:54,722 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2022-11-23 14:13:54,722 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2022-11-23 14:13:54,722 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2022-11-23 14:13:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:13:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2022-11-23 14:13:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2022-11-23 14:13:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-23 14:13:54,723 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2022-11-23 14:13:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2022-11-23 14:13:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-23 14:13:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 14:13:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 14:13:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-23 14:13:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-23 14:13:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_inc [2022-11-23 14:13:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_inc [2022-11-23 14:13:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2022-11-23 14:13:54,725 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2022-11-23 14:13:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:13:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2022-11-23 14:13:54,727 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2022-11-23 14:13:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:13:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2022-11-23 14:13:54,727 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2022-11-23 14:13:54,727 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-23 14:13:54,728 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-23 14:13:54,728 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2022-11-23 14:13:54,728 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2022-11-23 14:13:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2022-11-23 14:13:54,729 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2022-11-23 14:13:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2022-11-23 14:13:54,729 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2022-11-23 14:13:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-23 14:13:54,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-23 14:13:54,729 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-23 14:13:54,730 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-23 14:13:54,730 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 14:13:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 14:13:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 14:13:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 14:13:54,731 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 14:13:54,731 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 14:13:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2022-11-23 14:13:54,732 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2022-11-23 14:13:54,732 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 14:13:54,732 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 14:13:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2022-11-23 14:13:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2022-11-23 14:13:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:13:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2022-11-23 14:13:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2022-11-23 14:13:54,733 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-23 14:13:54,733 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-23 14:13:54,734 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2022-11-23 14:13:54,734 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2022-11-23 14:13:54,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:13:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2022-11-23 14:13:54,738 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2022-11-23 14:13:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure st_log_options [2022-11-23 14:13:54,740 INFO L138 BoogieDeclarations]: Found implementation of procedure st_log_options [2022-11-23 14:13:54,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:13:54,741 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2022-11-23 14:13:54,742 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2022-11-23 14:13:54,742 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2022-11-23 14:13:54,742 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2022-11-23 14:13:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2022-11-23 14:13:54,748 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2022-11-23 14:13:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2022-11-23 14:13:54,748 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2022-11-23 14:13:54,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:13:54,749 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:13:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2022-11-23 14:13:54,749 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2022-11-23 14:13:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2022-11-23 14:13:54,749 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2022-11-23 14:13:54,749 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2022-11-23 14:13:54,749 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2022-11-23 14:13:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 14:13:54,750 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 14:13:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2022-11-23 14:13:54,750 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2022-11-23 14:13:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:13:54,750 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 14:13:54,750 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 14:13:54,751 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-23 14:13:54,751 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-23 14:13:54,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:13:54,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:13:54,751 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-23 14:13:54,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-23 14:13:54,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 14:13:54,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 14:13:54,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:13:54,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 14:13:54,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 14:13:54,752 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-23 14:13:54,752 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-23 14:13:54,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:13:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure deb_space_print [2022-11-23 14:13:54,753 INFO L138 BoogieDeclarations]: Found implementation of procedure deb_space_print [2022-11-23 14:13:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2022-11-23 14:13:54,753 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2022-11-23 14:13:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-11-23 14:13:54,753 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-11-23 14:13:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:13:54,753 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 14:13:54,754 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2022-11-23 14:13:54,754 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2022-11-23 14:13:54,754 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2022-11-23 14:13:54,754 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2022-11-23 14:13:54,755 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2022-11-23 14:13:54,755 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2022-11-23 14:13:54,755 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2022-11-23 14:13:54,755 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2022-11-23 14:13:54,755 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2022-11-23 14:13:54,755 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2022-11-23 14:13:54,755 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush [2022-11-23 14:13:54,756 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush [2022-11-23 14:13:54,756 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 14:13:54,756 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 14:13:54,756 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2022-11-23 14:13:54,756 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2022-11-23 14:13:54,756 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-23 14:13:54,756 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-23 14:13:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-23 14:13:54,757 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-23 14:13:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure st_write [2022-11-23 14:13:54,757 INFO L138 BoogieDeclarations]: Found implementation of procedure st_write [2022-11-23 14:13:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 14:13:54,757 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 14:13:54,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:13:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2022-11-23 14:13:54,758 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2022-11-23 14:13:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2022-11-23 14:13:54,758 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2022-11-23 14:13:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:13:54,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:13:54,758 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 14:13:54,758 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 14:13:55,938 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:13:55,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:13:56,071 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:14:08,444 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:14:13,638 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:14:13,638 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:14:13,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:13 BoogieIcfgContainer [2022-11-23 14:14:13,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:14:13,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:14:13,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:14:13,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:14:13,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:13:50" (1/3) ... [2022-11-23 14:14:13,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137435f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:13, skipping insertion in model container [2022-11-23 14:14:13,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:13:53" (2/3) ... [2022-11-23 14:14:13,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137435f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:14:13, skipping insertion in model container [2022-11-23 14:14:13,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:14:13" (3/3) ... [2022-11-23 14:14:13,656 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-23 14:14:13,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:14:13,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:14:13,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:14:13,810 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;@22a47ee7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:14:13,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:14:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 1998 states, 1373 states have (on average 1.45156591405681) internal successors, (1993), 1413 states have internal predecessors, (1993), 538 states have call successors, (538), 86 states have call predecessors, (538), 85 states have return successors, (515), 514 states have call predecessors, (515), 515 states have call successors, (515) [2022-11-23 14:14:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-11-23 14:14:13,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:14:13,884 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:13,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:14:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:14:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -852682015, now seen corresponding path program 1 times [2022-11-23 14:14:13,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:14:13,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370350481] [2022-11-23 14:14:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:14:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:14:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2022-11-23 14:14:16,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370350481] [2022-11-23 14:14:16,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370350481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:14:16,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:14:16,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:14:16,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443453838] [2022-11-23 14:14:16,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:14:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:14:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:14:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:14:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:14:16,558 INFO L87 Difference]: Start difference. First operand has 1998 states, 1373 states have (on average 1.45156591405681) internal successors, (1993), 1413 states have internal predecessors, (1993), 538 states have call successors, (538), 86 states have call predecessors, (538), 85 states have return successors, (515), 514 states have call predecessors, (515), 515 states have call successors, (515) Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-23 14:14:18,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:19,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:22,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:14:26,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:28,548 WARN L539 Checker$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 14:14:30,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:33,027 WARN L539 Checker$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 14:14:35,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:37,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:14:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:14:40,721 INFO L93 Difference]: Finished difference Result 3787 states and 5781 transitions. [2022-11-23 14:14:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:14:40,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 790 [2022-11-23 14:14:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:14:40,775 INFO L225 Difference]: With dead ends: 3787 [2022-11-23 14:14:40,775 INFO L226 Difference]: Without dead ends: 3720 [2022-11-23 14:14:40,783 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 14:14:40,786 INFO L413 NwaCegarLoop]: 3147 mSDtfsCounter, 2778 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2778 SdHoareTripleChecker+Valid, 5655 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:14:40,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2778 Valid, 5655 Invalid, 667 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 662 Invalid, 4 Unknown, 0 Unchecked, 23.8s Time] [2022-11-23 14:14:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2022-11-23 14:14:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3720. [2022-11-23 14:14:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 2625 states have (on average 1.4476190476190476) internal successors, (3800), 2652 states have internal predecessors, (3800), 929 states have call successors, (929), 166 states have call predecessors, (929), 165 states have return successors, (928), 927 states have call predecessors, (928), 928 states have call successors, (928) [2022-11-23 14:14:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5657 transitions. [2022-11-23 14:14:41,307 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5657 transitions. Word has length 790 [2022-11-23 14:14:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:14:41,318 INFO L495 AbstractCegarLoop]: Abstraction has 3720 states and 5657 transitions. [2022-11-23 14:14:41,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-23 14:14:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5657 transitions. [2022-11-23 14:14:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-11-23 14:14:41,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:14:41,378 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:14:41,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:14:41,379 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:14:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:14:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1647743519, now seen corresponding path program 1 times [2022-11-23 14:14:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:14:41,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480980197] [2022-11-23 14:14:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:14:41,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:14:41,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:14:41,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807439040] [2022-11-23 14:14:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:14:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:14:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:14:41,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:14:42,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:14:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 9725 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:14:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:14:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16735 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2022-11-23 14:14:45,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:14:45,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480980197] [2022-11-23 14:14:45,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:14:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807439040] [2022-11-23 14:14:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807439040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:14:45,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:14:45,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:14:45,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433931974] [2022-11-23 14:14:45,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:14:45,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:14:45,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:14:45,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:14:45,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:14:45,656 INFO L87 Difference]: Start difference. First operand 3720 states and 5657 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2022-11-23 14:14:47,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:50,053 WARN L539 Checker$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 14:14:52,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:14:55,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:14:58,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:00,163 WARN L539 Checker$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 14:15:02,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:04,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:07,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:15:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:15:09,260 INFO L93 Difference]: Finished difference Result 8095 states and 12281 transitions. [2022-11-23 14:15:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:15:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) Word has length 851 [2022-11-23 14:15:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:15:09,291 INFO L225 Difference]: With dead ends: 8095 [2022-11-23 14:15:09,292 INFO L226 Difference]: Without dead ends: 4512 [2022-11-23 14:15:09,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 849 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 14:15:09,310 INFO L413 NwaCegarLoop]: 2745 mSDtfsCounter, 559 mSDsluCounter, 2636 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 10 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 5381 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:15:09,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 5381 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 689 Invalid, 7 Unknown, 0 Unchecked, 23.3s Time] [2022-11-23 14:15:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2022-11-23 14:15:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4506. [2022-11-23 14:15:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 3204 states have (on average 1.4516229712858926) internal successors, (4651), 3246 states have internal predecessors, (4651), 1078 states have call successors, (1078), 224 states have call predecessors, (1078), 223 states have return successors, (1077), 1075 states have call predecessors, (1077), 1077 states have call successors, (1077) [2022-11-23 14:15:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 6806 transitions. [2022-11-23 14:15:09,512 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 6806 transitions. Word has length 851 [2022-11-23 14:15:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:15:09,514 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 6806 transitions. [2022-11-23 14:15:09,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2022-11-23 14:15:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 6806 transitions. [2022-11-23 14:15:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2022-11-23 14:15:09,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:15:09,529 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:09,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:15:09,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:15:09,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:15:09,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:15:09,756 INFO L85 PathProgramCache]: Analyzing trace with hash 219743619, now seen corresponding path program 1 times [2022-11-23 14:15:09,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:15:09,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050056890] [2022-11-23 14:15:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:15:09,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:15:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:15:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16751 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16748 trivial. 0 not checked. [2022-11-23 14:15:11,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:15:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050056890] [2022-11-23 14:15:11,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050056890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:15:11,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:15:11,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:15:11,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026355994] [2022-11-23 14:15:11,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:15:11,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:15:11,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:15:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:15:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:15:11,254 INFO L87 Difference]: Start difference. First operand 4506 states and 6806 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2022-11-23 14:15:13,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:20,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:15:23,517 WARN L539 Checker$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 14:15:25,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:27,710 WARN L539 Checker$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 14:15:30,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:32,515 WARN L539 Checker$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 14:15:34,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:38,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:15:40,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:15:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:15:44,090 INFO L93 Difference]: Finished difference Result 12733 states and 19326 transitions. [2022-11-23 14:15:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:15:44,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) Word has length 879 [2022-11-23 14:15:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:15:44,145 INFO L225 Difference]: With dead ends: 12733 [2022-11-23 14:15:44,145 INFO L226 Difference]: Without dead ends: 8364 [2022-11-23 14:15:44,165 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 14:15:44,166 INFO L413 NwaCegarLoop]: 4501 mSDtfsCounter, 2551 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 1 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 7156 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:15:44,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 7156 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 911 Invalid, 9 Unknown, 0 Unchecked, 32.5s Time] [2022-11-23 14:15:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8364 states. [2022-11-23 14:15:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8364 to 8354. [2022-11-23 14:15:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 6020 states have (on average 1.4622923588039867) internal successors, (8803), 6096 states have internal predecessors, (8803), 1940 states have call successors, (1940), 394 states have call predecessors, (1940), 393 states have return successors, (1967), 1931 states have call predecessors, (1967), 1939 states have call successors, (1967) [2022-11-23 14:15:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 12710 transitions. [2022-11-23 14:15:44,568 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 12710 transitions. Word has length 879 [2022-11-23 14:15:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:15:44,571 INFO L495 AbstractCegarLoop]: Abstraction has 8354 states and 12710 transitions. [2022-11-23 14:15:44,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2022-11-23 14:15:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 12710 transitions. [2022-11-23 14:15:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2022-11-23 14:15:44,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:15:44,599 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:44,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:15:44,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:15:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:15:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash -14693617, now seen corresponding path program 1 times [2022-11-23 14:15:44,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:15:44,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193309362] [2022-11-23 14:15:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:15:44,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:15:45,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:15:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649697476] [2022-11-23 14:15:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:15:45,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:15:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:15:45,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:15:45,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:15:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:15:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 10060 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:15:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:15:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18531 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16756 trivial. 0 not checked. [2022-11-23 14:15:48,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:15:48,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:15:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193309362] [2022-11-23 14:15:48,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:15:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649697476] [2022-11-23 14:15:48,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649697476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:15:48,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:15:48,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:15:48,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904587546] [2022-11-23 14:15:48,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:15:48,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:15:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:15:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:15:48,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:15:48,411 INFO L87 Difference]: Start difference. First operand 8354 states and 12710 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2022-11-23 14:15:50,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:54,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:15:56,573 WARN L539 Checker$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 14:16:00,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:02,418 WARN L539 Checker$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 14:16:05,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:06,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:08,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:11,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:16:12,319 INFO L93 Difference]: Finished difference Result 21341 states and 32352 transitions. [2022-11-23 14:16:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:16:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) Word has length 904 [2022-11-23 14:16:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:16:12,415 INFO L225 Difference]: With dead ends: 21341 [2022-11-23 14:16:12,415 INFO L226 Difference]: Without dead ends: 13124 [2022-11-23 14:16:12,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 902 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 14:16:12,459 INFO L413 NwaCegarLoop]: 2953 mSDtfsCounter, 1964 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 5444 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:16:12,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 5444 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 680 Invalid, 6 Unknown, 0 Unchecked, 23.5s Time] [2022-11-23 14:16:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13124 states. [2022-11-23 14:16:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13124 to 13118. [2022-11-23 14:16:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13118 states, 9454 states have (on average 1.459805373386926) internal successors, (13801), 9574 states have internal predecessors, (13801), 2988 states have call successors, (2988), 676 states have call predecessors, (2988), 675 states have return successors, (3031), 2975 states have call predecessors, (3031), 2987 states have call successors, (3031) [2022-11-23 14:16:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13118 states to 13118 states and 19820 transitions. [2022-11-23 14:16:13,261 INFO L78 Accepts]: Start accepts. Automaton has 13118 states and 19820 transitions. Word has length 904 [2022-11-23 14:16:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:16:13,262 INFO L495 AbstractCegarLoop]: Abstraction has 13118 states and 19820 transitions. [2022-11-23 14:16:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2022-11-23 14:16:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 13118 states and 19820 transitions. [2022-11-23 14:16:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2022-11-23 14:16:13,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:16:13,293 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:13,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:16:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:16:13,509 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:16:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:16:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 600633777, now seen corresponding path program 1 times [2022-11-23 14:16:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:16:13,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598995306] [2022-11-23 14:16:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:16:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:16:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2022-11-23 14:16:15,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:16:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598995306] [2022-11-23 14:16:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598995306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:16:15,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:16:15,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:16:15,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536915224] [2022-11-23 14:16:15,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:16:15,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:16:15,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:16:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:16:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:16:15,371 INFO L87 Difference]: Start difference. First operand 13118 states and 19820 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2022-11-23 14:16:17,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:19,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:21,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:26,795 WARN L539 Checker$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 14:16:28,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:32,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:34,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:36,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:38,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:41,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:43,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:45,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:16:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:16:47,489 INFO L93 Difference]: Finished difference Result 26137 states and 39493 transitions. [2022-11-23 14:16:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:16:47,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 932 [2022-11-23 14:16:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:16:47,555 INFO L225 Difference]: With dead ends: 26137 [2022-11-23 14:16:47,555 INFO L226 Difference]: Without dead ends: 13140 [2022-11-23 14:16:47,603 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 14:16:47,604 INFO L413 NwaCegarLoop]: 2659 mSDtfsCounter, 14 mSDsluCounter, 5314 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7973 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:16:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7973 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 995 Invalid, 6 Unknown, 0 Unchecked, 31.7s Time] [2022-11-23 14:16:47,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13140 states. [2022-11-23 14:16:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13140 to 12783. [2022-11-23 14:16:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12783 states, 9267 states have (on average 1.4603431531239883) internal successors, (13533), 9351 states have internal predecessors, (13533), 2880 states have call successors, (2880), 636 states have call predecessors, (2880), 635 states have return successors, (2923), 2871 states have call predecessors, (2923), 2879 states have call successors, (2923) [2022-11-23 14:16:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12783 states to 12783 states and 19336 transitions. [2022-11-23 14:16:48,163 INFO L78 Accepts]: Start accepts. Automaton has 12783 states and 19336 transitions. Word has length 932 [2022-11-23 14:16:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:16:48,165 INFO L495 AbstractCegarLoop]: Abstraction has 12783 states and 19336 transitions. [2022-11-23 14:16:48,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2022-11-23 14:16:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 12783 states and 19336 transitions. [2022-11-23 14:16:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2022-11-23 14:16:48,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:16:48,191 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:48,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:16:48,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:16:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:16:48,192 INFO L85 PathProgramCache]: Analyzing trace with hash 229135823, now seen corresponding path program 1 times [2022-11-23 14:16:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:16:48,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357091221] [2022-11-23 14:16:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:16:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:16:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18521 trivial. 0 not checked. [2022-11-23 14:16:49,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:16:49,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357091221] [2022-11-23 14:16:49,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357091221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:16:49,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:16:49,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:16:49,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070537033] [2022-11-23 14:16:49,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:16:49,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:16:49,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:16:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:16:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:16:49,901 INFO L87 Difference]: Start difference. First operand 12783 states and 19336 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-23 14:16:52,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:57,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:16:59,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:03,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:05,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:07,239 WARN L539 Checker$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 14:17:10,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:17:11,080 INFO L93 Difference]: Finished difference Result 19152 states and 28981 transitions. [2022-11-23 14:17:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:17:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 937 [2022-11-23 14:17:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:17:11,143 INFO L225 Difference]: With dead ends: 19152 [2022-11-23 14:17:11,143 INFO L226 Difference]: Without dead ends: 12785 [2022-11-23 14:17:11,164 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 14:17:11,165 INFO L413 NwaCegarLoop]: 2662 mSDtfsCounter, 0 mSDsluCounter, 2660 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5322 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:17:11,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5322 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 655 Invalid, 6 Unknown, 0 Unchecked, 20.9s Time] [2022-11-23 14:17:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12785 states. [2022-11-23 14:17:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12785 to 12785. [2022-11-23 14:17:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12785 states, 9269 states have (on average 1.4602438234976804) internal successors, (13535), 9353 states have internal predecessors, (13535), 2880 states have call successors, (2880), 636 states have call predecessors, (2880), 635 states have return successors, (2923), 2871 states have call predecessors, (2923), 2879 states have call successors, (2923) [2022-11-23 14:17:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12785 states to 12785 states and 19338 transitions. [2022-11-23 14:17:11,691 INFO L78 Accepts]: Start accepts. Automaton has 12785 states and 19338 transitions. Word has length 937 [2022-11-23 14:17:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:17:11,692 INFO L495 AbstractCegarLoop]: Abstraction has 12785 states and 19338 transitions. [2022-11-23 14:17:11,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-23 14:17:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 12785 states and 19338 transitions. [2022-11-23 14:17:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-11-23 14:17:11,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:17:11,719 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:11,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:17:11,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:17:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:17:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1699668130, now seen corresponding path program 1 times [2022-11-23 14:17:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:17:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032156486] [2022-11-23 14:17:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:11,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:17:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2022-11-23 14:17:13,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:17:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032156486] [2022-11-23 14:17:13,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032156486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657274389] [2022-11-23 14:17:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:13,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:17:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:17:13,594 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:17:13,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:17:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 10586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:17:16,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 1760 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2022-11-23 14:17:17,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:17:17,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657274389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:17:17,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:17:17,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:17:17,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315612511] [2022-11-23 14:17:17,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:17:17,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:17:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:17:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:17:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:17:17,244 INFO L87 Difference]: Start difference. First operand 12785 states and 19338 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-23 14:17:19,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:21,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:25,287 WARN L539 Checker$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 14:17:26,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:29,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:32,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:35,256 WARN L539 Checker$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 14:17:37,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:17:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:17:41,420 INFO L93 Difference]: Finished difference Result 31956 states and 48547 transitions. [2022-11-23 14:17:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:17:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 939 [2022-11-23 14:17:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:17:41,529 INFO L225 Difference]: With dead ends: 31956 [2022-11-23 14:17:41,529 INFO L226 Difference]: Without dead ends: 19106 [2022-11-23 14:17:41,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 939 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:17:41,577 INFO L413 NwaCegarLoop]: 3397 mSDtfsCounter, 2564 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2592 SdHoareTripleChecker+Valid, 6028 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:17:41,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2592 Valid, 6028 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 707 Invalid, 7 Unknown, 0 Unchecked, 23.6s Time] [2022-11-23 14:17:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2022-11-23 14:17:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 19054. [2022-11-23 14:17:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19054 states, 13851 states have (on average 1.4617717132337016) internal successors, (20247), 13970 states have internal predecessors, (20247), 4233 states have call successors, (4233), 970 states have call predecessors, (4233), 969 states have return successors, (4416), 4216 states have call predecessors, (4416), 4232 states have call successors, (4416) [2022-11-23 14:17:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19054 states to 19054 states and 28896 transitions. [2022-11-23 14:17:42,560 INFO L78 Accepts]: Start accepts. Automaton has 19054 states and 28896 transitions. Word has length 939 [2022-11-23 14:17:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:17:42,561 INFO L495 AbstractCegarLoop]: Abstraction has 19054 states and 28896 transitions. [2022-11-23 14:17:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-23 14:17:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19054 states and 28896 transitions. [2022-11-23 14:17:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-11-23 14:17:42,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:17:42,591 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:42,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 14:17:42,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:17:42,819 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:17:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:17:42,820 INFO L85 PathProgramCache]: Analyzing trace with hash 61383258, now seen corresponding path program 1 times [2022-11-23 14:17:42,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:17:42,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216670009] [2022-11-23 14:17:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:17:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18551 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 18536 trivial. 0 not checked. [2022-11-23 14:17:44,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:17:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216670009] [2022-11-23 14:17:44,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216670009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:44,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747722359] [2022-11-23 14:17:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:44,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:17:44,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:17:44,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:17:44,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:17:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 10649 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:17:47,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18551 trivial. 0 not checked. [2022-11-23 14:17:50,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:17:50,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747722359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:17:50,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:17:50,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-23 14:17:50,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576431414] [2022-11-23 14:17:50,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:17:50,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:17:50,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:17:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:17:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:17:50,182 INFO L87 Difference]: Start difference. First operand 19054 states and 28896 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2022-11-23 14:17:52,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:56,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:17:58,861 WARN L539 Checker$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 14:18:01,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:18:04,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:18:06,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:18:08,303 WARN L539 Checker$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 14:18:10,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:18:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:13,717 INFO L93 Difference]: Finished difference Result 26135 states and 39638 transitions. [2022-11-23 14:18:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:18:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) Word has length 957 [2022-11-23 14:18:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:13,860 INFO L225 Difference]: With dead ends: 26135 [2022-11-23 14:18:13,861 INFO L226 Difference]: Without dead ends: 25903 [2022-11-23 14:18:13,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:18:13,879 INFO L413 NwaCegarLoop]: 3135 mSDtfsCounter, 2622 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 5596 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:13,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2636 Valid, 5596 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 663 Invalid, 6 Unknown, 0 Unchecked, 23.0s Time] [2022-11-23 14:18:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25903 states. [2022-11-23 14:18:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25903 to 25516. [2022-11-23 14:18:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25516 states, 18468 states have (on average 1.4590101797704136) internal successors, (26945), 18635 states have internal predecessors, (26945), 5699 states have call successors, (5699), 1349 states have call predecessors, (5699), 1348 states have return successors, (6014), 5664 states have call predecessors, (6014), 5698 states have call successors, (6014) [2022-11-23 14:18:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25516 states to 25516 states and 38658 transitions. [2022-11-23 14:18:15,081 INFO L78 Accepts]: Start accepts. Automaton has 25516 states and 38658 transitions. Word has length 957 [2022-11-23 14:18:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:15,082 INFO L495 AbstractCegarLoop]: Abstraction has 25516 states and 38658 transitions. [2022-11-23 14:18:15,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2022-11-23 14:18:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 25516 states and 38658 transitions. [2022-11-23 14:18:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-11-23 14:18:15,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:15,142 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:15,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:15,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:18:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2099416481, now seen corresponding path program 1 times [2022-11-23 14:18:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:15,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110713551] [2022-11-23 14:18:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:15,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:18:15,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609317315] [2022-11-23 14:18:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:15,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:15,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:15,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:15,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:18:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 10468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:18:19,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18575 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16800 trivial. 0 not checked. [2022-11-23 14:18:19,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:18:19,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110713551] [2022-11-23 14:18:19,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:18:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609317315] [2022-11-23 14:18:19,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609317315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:18:19,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:18:19,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:18:19,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298568158] [2022-11-23 14:18:19,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:18:19,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:18:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:18:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:18:19,661 INFO L87 Difference]: Start difference. First operand 25516 states and 38658 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-23 14:18:22,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:18:26,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:18:30,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:18:33,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:18:35,454 WARN L539 Checker$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 14:18:37,479 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 14:18:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:42,370 INFO L93 Difference]: Finished difference Result 50470 states and 76848 transitions. [2022-11-23 14:18:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:18:42,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 975 [2022-11-23 14:18:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:42,562 INFO L225 Difference]: With dead ends: 50470 [2022-11-23 14:18:42,562 INFO L226 Difference]: Without dead ends: 38044 [2022-11-23 14:18:42,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 973 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 14:18:42,630 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 2501 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2515 SdHoareTripleChecker+Valid, 5982 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:42,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2515 Valid, 5982 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 697 Invalid, 6 Unknown, 0 Unchecked, 21.7s Time] [2022-11-23 14:18:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38044 states. [2022-11-23 14:18:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38044 to 36898. [2022-11-23 14:18:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36898 states, 26734 states have (on average 1.4610982269768833) internal successors, (39061), 26976 states have internal predecessors, (39061), 8249 states have call successors, (8249), 1915 states have call predecessors, (8249), 1914 states have return successors, (8792), 8194 states have call predecessors, (8792), 8248 states have call successors, (8792) [2022-11-23 14:18:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36898 states to 36898 states and 56102 transitions. [2022-11-23 14:18:44,386 INFO L78 Accepts]: Start accepts. Automaton has 36898 states and 56102 transitions. Word has length 975 [2022-11-23 14:18:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:44,387 INFO L495 AbstractCegarLoop]: Abstraction has 36898 states and 56102 transitions. [2022-11-23 14:18:44,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-23 14:18:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 36898 states and 56102 transitions. [2022-11-23 14:18:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2022-11-23 14:18:44,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:44,447 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:44,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:44,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:44,659 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:18:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1003448549, now seen corresponding path program 1 times [2022-11-23 14:18:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78356631] [2022-11-23 14:18:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:45,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:18:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973910069] [2022-11-23 14:18:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:45,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:45,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:18:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 10531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:18:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18583 trivial. 0 not checked. [2022-11-23 14:18:51,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:18:51,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78356631] [2022-11-23 14:18:51,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:18:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973910069] [2022-11-23 14:18:51,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973910069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:18:51,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:18:51,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:18:51,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568685578] [2022-11-23 14:18:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:18:51,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:18:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:18:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:18:51,636 INFO L87 Difference]: Start difference. First operand 36898 states and 56102 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-23 14:18:53,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:18:55,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:18:58,614 WARN L539 Checker$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 14:19:01,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:02,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:04,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:07,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:09,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:11,976 WARN L539 Checker$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 14:19:15,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:17,696 INFO L93 Difference]: Finished difference Result 43456 states and 66063 transitions. [2022-11-23 14:19:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:19:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 993 [2022-11-23 14:19:17,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:17,872 INFO L225 Difference]: With dead ends: 43456 [2022-11-23 14:19:17,873 INFO L226 Difference]: Without dead ends: 43224 [2022-11-23 14:19:17,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 991 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 14:19:17,890 INFO L413 NwaCegarLoop]: 3085 mSDtfsCounter, 2518 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 5546 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:17,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2518 Valid, 5546 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 655 Invalid, 6 Unknown, 0 Unchecked, 25.0s Time] [2022-11-23 14:19:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43224 states. [2022-11-23 14:19:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43224 to 42861. [2022-11-23 14:19:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42861 states, 31066 states have (on average 1.4609540977274191) internal successors, (45386), 31339 states have internal predecessors, (45386), 9581 states have call successors, (9581), 2214 states have call predecessors, (9581), 2213 states have return successors, (10146), 9524 states have call predecessors, (10146), 9580 states have call successors, (10146) [2022-11-23 14:19:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42861 states to 42861 states and 65113 transitions. [2022-11-23 14:19:19,618 INFO L78 Accepts]: Start accepts. Automaton has 42861 states and 65113 transitions. Word has length 993 [2022-11-23 14:19:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:19,620 INFO L495 AbstractCegarLoop]: Abstraction has 42861 states and 65113 transitions. [2022-11-23 14:19:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-23 14:19:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 42861 states and 65113 transitions. [2022-11-23 14:19:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2022-11-23 14:19:19,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:19,699 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:19,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:19,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:19:19,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:19:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash -620729724, now seen corresponding path program 1 times [2022-11-23 14:19:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:19,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929876673] [2022-11-23 14:19:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:20,595 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:19:20,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331013539] [2022-11-23 14:19:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:20,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:20,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:20,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:20,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:19:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:24,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 11373 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:19:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18564 backedges. 1781 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2022-11-23 14:19:25,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:19:25,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929876673] [2022-11-23 14:19:25,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:19:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331013539] [2022-11-23 14:19:25,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331013539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:25,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:25,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:19:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866622105] [2022-11-23 14:19:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:25,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:19:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:19:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:19:25,019 INFO L87 Difference]: Start difference. First operand 42861 states and 65113 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-23 14:19:27,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:32,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:34,497 WARN L539 Checker$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 14:19:36,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:38,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:41,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:42,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:44,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:47,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:19:50,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:19:52,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:52,688 INFO L93 Difference]: Finished difference Result 76037 states and 115657 transitions. [2022-11-23 14:19:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:19:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 1000 [2022-11-23 14:19:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:53,038 INFO L225 Difference]: With dead ends: 76037 [2022-11-23 14:19:53,039 INFO L226 Difference]: Without dead ends: 45985 [2022-11-23 14:19:53,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 998 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 14:19:53,118 INFO L413 NwaCegarLoop]: 3000 mSDtfsCounter, 1955 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 14 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 5490 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:53,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1963 Valid, 5490 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 690 Invalid, 6 Unknown, 0 Unchecked, 26.5s Time] [2022-11-23 14:19:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45985 states. [2022-11-23 14:19:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45985 to 45865. [2022-11-23 14:19:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45865 states, 33286 states have (on average 1.461244967854353) internal successors, (48639), 33592 states have internal predecessors, (48639), 10168 states have call successors, (10168), 2410 states have call predecessors, (10168), 2410 states have return successors, (10795), 10096 states have call predecessors, (10795), 10167 states have call successors, (10795) [2022-11-23 14:19:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45865 states to 45865 states and 69602 transitions. [2022-11-23 14:19:54,955 INFO L78 Accepts]: Start accepts. Automaton has 45865 states and 69602 transitions. Word has length 1000 [2022-11-23 14:19:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:54,957 INFO L495 AbstractCegarLoop]: Abstraction has 45865 states and 69602 transitions. [2022-11-23 14:19:54,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-23 14:19:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 45865 states and 69602 transitions. [2022-11-23 14:19:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 990 [2022-11-23 14:19:55,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:55,008 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:55,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:55,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:55,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:19:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2110729570, now seen corresponding path program 1 times [2022-11-23 14:19:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:55,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937970954] [2022-11-23 14:19:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:55,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18575 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18540 trivial. 0 not checked. [2022-11-23 14:19:57,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:57,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937970954] [2022-11-23 14:19:57,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937970954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:57,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:57,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:19:57,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040450298] [2022-11-23 14:19:57,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:57,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:19:57,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:19:57,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:19:57,173 INFO L87 Difference]: Start difference. First operand 45865 states and 69602 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (89), 2 states have call predecessors, (89), 1 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2022-11-23 14:19:59,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:04,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:06,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:07,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:10,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:20:11,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:20:14,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:20:15,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:17,485 WARN L539 Checker$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 14:20:19,505 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 14:20:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:20:22,202 INFO L93 Difference]: Finished difference Result 91324 states and 138608 transitions. [2022-11-23 14:20:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:20:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (89), 2 states have call predecessors, (89), 1 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 989 [2022-11-23 14:20:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:20:22,497 INFO L225 Difference]: With dead ends: 91324 [2022-11-23 14:20:22,497 INFO L226 Difference]: Without dead ends: 45879 [2022-11-23 14:20:22,585 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 14:20:22,585 INFO L413 NwaCegarLoop]: 2662 mSDtfsCounter, 0 mSDsluCounter, 2660 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5322 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:20:22,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5322 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 658 Invalid, 5 Unknown, 0 Unchecked, 23.9s Time] [2022-11-23 14:20:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45879 states. [2022-11-23 14:20:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45879 to 45879. [2022-11-23 14:20:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45879 states, 33300 states have (on average 1.461051051051051) internal successors, (48653), 33606 states have internal predecessors, (48653), 10168 states have call successors, (10168), 2410 states have call predecessors, (10168), 2410 states have return successors, (10795), 10096 states have call predecessors, (10795), 10167 states have call successors, (10795) [2022-11-23 14:20:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45879 states to 45879 states and 69616 transitions. [2022-11-23 14:20:24,120 INFO L78 Accepts]: Start accepts. Automaton has 45879 states and 69616 transitions. Word has length 989 [2022-11-23 14:20:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:20:24,122 INFO L495 AbstractCegarLoop]: Abstraction has 45879 states and 69616 transitions. [2022-11-23 14:20:24,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (89), 2 states have call predecessors, (89), 1 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2022-11-23 14:20:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 45879 states and 69616 transitions. [2022-11-23 14:20:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2022-11-23 14:20:24,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:20:24,160 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:24,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:20:24,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:20:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:20:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash -568941987, now seen corresponding path program 1 times [2022-11-23 14:20:24,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:20:24,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546760446] [2022-11-23 14:20:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:20:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:20:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:20:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18576 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 18540 trivial. 0 not checked. [2022-11-23 14:20:26,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:20:26,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546760446] [2022-11-23 14:20:26,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546760446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:20:26,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978375961] [2022-11-23 14:20:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:20:26,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:20:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:20:26,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:20:26,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:20:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:20:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 10374 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:20:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:20:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18576 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16801 trivial. 0 not checked. [2022-11-23 14:20:30,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:20:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978375961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:20:30,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:20:30,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 14:20:30,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857148860] [2022-11-23 14:20:30,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:20:30,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:20:30,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:20:30,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:20:30,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:20:30,336 INFO L87 Difference]: Start difference. First operand 45879 states and 69616 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-23 14:20:32,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:34,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:38,050 WARN L539 Checker$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 14:20:41,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:20:44,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:20:47,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:51,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:20:53,217 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 14:20:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:20:56,511 INFO L93 Difference]: Finished difference Result 78949 states and 120222 transitions. [2022-11-23 14:20:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:20:56,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 990 [2022-11-23 14:20:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:20:56,690 INFO L225 Difference]: With dead ends: 78949 [2022-11-23 14:20:56,691 INFO L226 Difference]: Without dead ends: 53017 [2022-11-23 14:20:56,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:20:56,758 INFO L413 NwaCegarLoop]: 3394 mSDtfsCounter, 2444 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2472 SdHoareTripleChecker+Valid, 6025 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:20:56,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2472 Valid, 6025 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 708 Invalid, 7 Unknown, 0 Unchecked, 24.9s Time] [2022-11-23 14:20:56,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53017 states. [2022-11-23 14:20:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53017 to 51498. [2022-11-23 14:20:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51498 states, 37369 states have (on average 1.4616125665658701) internal successors, (54619), 37716 states have internal predecessors, (54619), 11435 states have call successors, (11435), 2693 states have call predecessors, (11435), 2693 states have return successors, (12215), 11350 states have call predecessors, (12215), 11434 states have call successors, (12215) [2022-11-23 14:20:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51498 states to 51498 states and 78269 transitions. [2022-11-23 14:20:58,530 INFO L78 Accepts]: Start accepts. Automaton has 51498 states and 78269 transitions. Word has length 990 [2022-11-23 14:20:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:20:58,531 INFO L495 AbstractCegarLoop]: Abstraction has 51498 states and 78269 transitions. [2022-11-23 14:20:58,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-23 14:20:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 51498 states and 78269 transitions. [2022-11-23 14:20:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2022-11-23 14:20:58,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:20:58,569 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:58,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:20:58,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:20:58,781 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:20:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:20:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2049508249, now seen corresponding path program 1 times [2022-11-23 14:20:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:20:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553019484] [2022-11-23 14:20:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:20:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:20:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18584 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 18554 trivial. 0 not checked. [2022-11-23 14:21:00,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:00,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553019484] [2022-11-23 14:21:00,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553019484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:21:00,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340423768] [2022-11-23 14:21:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:00,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:00,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:21:00,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:21:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:04,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 10437 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:21:04,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:21:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18584 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18584 trivial. 0 not checked. [2022-11-23 14:21:06,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:21:06,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340423768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:06,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:21:06,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-23 14:21:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610999063] [2022-11-23 14:21:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:06,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:21:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:21:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:21:06,975 INFO L87 Difference]: Start difference. First operand 51498 states and 78269 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-23 14:21:09,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:21:13,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:21:15,981 WARN L539 Checker$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 14:21:17,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:21:19,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:21:22,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:21:25,196 WARN L539 Checker$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 14:21:26,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:21:29,727 WARN L539 Checker$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 14:21:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:32,832 INFO L93 Difference]: Finished difference Result 58313 states and 88638 transitions. [2022-11-23 14:21:32,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:21:32,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 1008 [2022-11-23 14:21:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:33,028 INFO L225 Difference]: With dead ends: 58313 [2022-11-23 14:21:33,028 INFO L226 Difference]: Without dead ends: 58081 [2022-11-23 14:21:33,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:21:33,051 INFO L413 NwaCegarLoop]: 3131 mSDtfsCounter, 2502 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 5592 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:33,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2516 Valid, 5592 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 663 Invalid, 7 Unknown, 0 Unchecked, 24.8s Time] [2022-11-23 14:21:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58081 states. [2022-11-23 14:21:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58081 to 57343. [2022-11-23 14:21:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57343 states, 41582 states have (on average 1.4611851281804626) internal successors, (60759), 41968 states have internal predecessors, (60759), 12749 states have call successors, (12749), 3011 states have call predecessors, (12749), 3011 states have return successors, (13639), 12652 states have call predecessors, (13639), 12748 states have call successors, (13639) [2022-11-23 14:21:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57343 states to 57343 states and 87147 transitions. [2022-11-23 14:21:34,953 INFO L78 Accepts]: Start accepts. Automaton has 57343 states and 87147 transitions. Word has length 1008 [2022-11-23 14:21:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:34,954 INFO L495 AbstractCegarLoop]: Abstraction has 57343 states and 87147 transitions. [2022-11-23 14:21:34,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-23 14:21:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 57343 states and 87147 transitions. [2022-11-23 14:21:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1051 [2022-11-23 14:21:35,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:35,032 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:35,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:21:35,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:21:35,233 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:21:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2109696362, now seen corresponding path program 1 times [2022-11-23 14:21:35,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:35,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808741045] [2022-11-23 14:21:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:35,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:35,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:21:35,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527902406] [2022-11-23 14:21:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:35,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:35,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:21:35,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:21:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 11227 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:21:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:21:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18661 backedges. 1784 proven. 0 refuted. 0 times theorem prover too weak. 16877 trivial. 0 not checked. [2022-11-23 14:21:40,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:21:40,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:40,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808741045] [2022-11-23 14:21:40,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:21:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527902406] [2022-11-23 14:21:40,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527902406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:21:40,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:21:40,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:21:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778177868] [2022-11-23 14:21:40,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:21:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:21:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:21:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:21:40,562 INFO L87 Difference]: Start difference. First operand 57343 states and 87147 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2022-11-23 14:21:42,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:21:46,810 WARN L539 Checker$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 14:21:50,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:21:54,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:21:57,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:22:01,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:22:02,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:22:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:22:06,537 INFO L93 Difference]: Finished difference Result 108447 states and 165280 transitions. [2022-11-23 14:22:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:22:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 1050 [2022-11-23 14:22:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:22:06,926 INFO L225 Difference]: With dead ends: 108447 [2022-11-23 14:22:06,927 INFO L226 Difference]: Without dead ends: 76896 [2022-11-23 14:22:07,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 1048 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 14:22:07,006 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 2488 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2502 SdHoareTripleChecker+Valid, 5988 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:22:07,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2502 Valid, 5988 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 699 Invalid, 5 Unknown, 0 Unchecked, 24.2s Time] [2022-11-23 14:22:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76896 states. [2022-11-23 14:22:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76896 to 74685. [2022-11-23 14:22:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74685 states, 54102 states have (on average 1.461110494990943) internal successors, (79049), 54609 states have internal predecessors, (79049), 16670 states have call successors, (16670), 3912 states have call predecessors, (16670), 3912 states have return successors, (17923), 16535 states have call predecessors, (17923), 16669 states have call successors, (17923) [2022-11-23 14:22:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74685 states to 74685 states and 113642 transitions. [2022-11-23 14:22:09,721 INFO L78 Accepts]: Start accepts. Automaton has 74685 states and 113642 transitions. Word has length 1050 [2022-11-23 14:22:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:22:09,722 INFO L495 AbstractCegarLoop]: Abstraction has 74685 states and 113642 transitions. [2022-11-23 14:22:09,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 3 states have call successors, (95), 3 states have call predecessors, (95), 2 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2022-11-23 14:22:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 74685 states and 113642 transitions. [2022-11-23 14:22:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2022-11-23 14:22:09,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:22:09,817 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:09,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:22:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:22:10,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:22:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:22:10,019 INFO L85 PathProgramCache]: Analyzing trace with hash -323449900, now seen corresponding path program 1 times [2022-11-23 14:22:10,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:22:10,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617413271] [2022-11-23 14:22:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:22:10,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:22:10,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632876748] [2022-11-23 14:22:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:22:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:22:10,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:22:10,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:22:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:22:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 11746 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:22:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:22:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18627 backedges. 1778 proven. 0 refuted. 0 times theorem prover too weak. 16849 trivial. 0 not checked. [2022-11-23 14:22:15,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:22:15,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:22:15,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617413271] [2022-11-23 14:22:15,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:22:15,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632876748] [2022-11-23 14:22:15,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632876748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:22:15,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:22:15,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:22:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64826473] [2022-11-23 14:22:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:22:15,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:22:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:22:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:22:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:22:15,523 INFO L87 Difference]: Start difference. First operand 74685 states and 113642 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-23 14:22:18,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:22:19,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:22:23,038 WARN L539 Checker$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 14:22:25,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:22:28,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:22:30,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:22:33,061 WARN L539 Checker$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 14:22:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:22:41,403 INFO L93 Difference]: Finished difference Result 139343 states and 212419 transitions. [2022-11-23 14:22:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:22:41,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 1066 [2022-11-23 14:22:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:22:41,767 INFO L225 Difference]: With dead ends: 139343 [2022-11-23 14:22:41,767 INFO L226 Difference]: Without dead ends: 96295 [2022-11-23 14:22:41,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1064 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 14:22:41,891 INFO L413 NwaCegarLoop]: 3416 mSDtfsCounter, 2518 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 6047 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:22:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2532 Valid, 6047 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 705 Invalid, 6 Unknown, 0 Unchecked, 23.7s Time] [2022-11-23 14:22:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96295 states. [2022-11-23 14:22:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96295 to 95474. [2022-11-23 14:22:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95474 states, 69234 states have (on average 1.4614929081087327) internal successors, (101185), 69896 states have internal predecessors, (101185), 21222 states have call successors, (21222), 5017 states have call predecessors, (21222), 5017 states have return successors, (22883), 21039 states have call predecessors, (22883), 21221 states have call successors, (22883) [2022-11-23 14:22:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95474 states to 95474 states and 145290 transitions. [2022-11-23 14:22:45,213 INFO L78 Accepts]: Start accepts. Automaton has 95474 states and 145290 transitions. Word has length 1066 [2022-11-23 14:22:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:22:45,214 INFO L495 AbstractCegarLoop]: Abstraction has 95474 states and 145290 transitions. [2022-11-23 14:22:45,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-23 14:22:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 95474 states and 145290 transitions. [2022-11-23 14:22:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2022-11-23 14:22:45,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:22:45,651 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:45,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 14:22:45,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:22:45,852 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:22:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:22:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1668612454, now seen corresponding path program 1 times [2022-11-23 14:22:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:22:45,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163910776] [2022-11-23 14:22:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:45,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:22:46,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:22:46,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291230014] [2022-11-23 14:22:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:46,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:22:46,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:22:46,215 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:22:46,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:22:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:22:50,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 11290 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:22:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:22:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18669 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18669 trivial. 0 not checked. [2022-11-23 14:22:52,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:22:52,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:22:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163910776] [2022-11-23 14:22:52,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:22:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291230014] [2022-11-23 14:22:52,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291230014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:22:52,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:22:52,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:22:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883534573] [2022-11-23 14:22:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:22:52,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:22:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:22:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:22:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:22:52,982 INFO L87 Difference]: Start difference. First operand 95474 states and 145290 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2022-11-23 14:22:55,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:22:59,104 WARN L539 Checker$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 14:23:01,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:03,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:05,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:08,750 WARN L539 Checker$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 14:23:12,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:14,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:15,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:19,919 INFO L93 Difference]: Finished difference Result 103386 states and 157223 transitions. [2022-11-23 14:23:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:19,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 1068 [2022-11-23 14:23:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:20,322 INFO L225 Difference]: With dead ends: 103386 [2022-11-23 14:23:20,322 INFO L226 Difference]: Without dead ends: 103154 [2022-11-23 14:23:20,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1066 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 14:23:20,358 INFO L413 NwaCegarLoop]: 3091 mSDtfsCounter, 2505 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2505 SdHoareTripleChecker+Valid, 5552 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:20,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2505 Valid, 5552 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 656 Invalid, 6 Unknown, 0 Unchecked, 25.0s Time] [2022-11-23 14:23:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103154 states. [2022-11-23 14:23:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103154 to 102101. [2022-11-23 14:23:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102101 states, 74006 states have (on average 1.4610166743237034) internal successors, (108124), 74714 states have internal predecessors, (108124), 22715 states have call successors, (22715), 5375 states have call predecessors, (22715), 5379 states have return successors, (24486), 22523 states have call predecessors, (24486), 22714 states have call successors, (24486) [2022-11-23 14:23:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102101 states to 102101 states and 155325 transitions. [2022-11-23 14:23:23,838 INFO L78 Accepts]: Start accepts. Automaton has 102101 states and 155325 transitions. Word has length 1068 [2022-11-23 14:23:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:23,839 INFO L495 AbstractCegarLoop]: Abstraction has 102101 states and 155325 transitions. [2022-11-23 14:23:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2022-11-23 14:23:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 102101 states and 155325 transitions. [2022-11-23 14:23:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2022-11-23 14:23:24,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:24,267 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:24,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:23:24,469 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:24,469 INFO L85 PathProgramCache]: Analyzing trace with hash 800464208, now seen corresponding path program 1 times [2022-11-23 14:23:24,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:24,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429809949] [2022-11-23 14:23:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:24,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:24,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933352874] [2022-11-23 14:23:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:24,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:24,812 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:24,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:23:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 11809 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:23:29,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18635 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18635 trivial. 0 not checked. [2022-11-23 14:23:31,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:23:31,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429809949] [2022-11-23 14:23:31,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933352874] [2022-11-23 14:23:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933352874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:23:31,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:23:31,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:23:31,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284176174] [2022-11-23 14:23:31,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:23:31,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:23:31,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:23:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:23:31,774 INFO L87 Difference]: Start difference. First operand 102101 states and 155325 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2022-11-23 14:23:33,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:37,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:39,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:40,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:43,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:45,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:47,786 WARN L539 Checker$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 14:23:53,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:23:55,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:58,763 INFO L93 Difference]: Finished difference Result 110228 states and 167569 transitions. [2022-11-23 14:23:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:23:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 1084 [2022-11-23 14:23:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:59,341 INFO L225 Difference]: With dead ends: 110228 [2022-11-23 14:23:59,341 INFO L226 Difference]: Without dead ends: 109996 [2022-11-23 14:23:59,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1082 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 14:23:59,374 INFO L413 NwaCegarLoop]: 3112 mSDtfsCounter, 2532 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2532 SdHoareTripleChecker+Valid, 5573 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:59,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2532 Valid, 5573 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 654 Invalid, 7 Unknown, 0 Unchecked, 24.9s Time] [2022-11-23 14:23:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109996 states. [2022-11-23 14:24:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109996 to 109645. [2022-11-23 14:24:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109645 states, 79464 states have (on average 1.4606488472767543) internal successors, (116069), 80224 states have internal predecessors, (116069), 24387 states have call successors, (24387), 5787 states have call predecessors, (24387), 5793 states have return successors, (26234), 24183 states have call predecessors, (26234), 24386 states have call successors, (26234) [2022-11-23 14:24:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109645 states to 109645 states and 166690 transitions. [2022-11-23 14:24:03,325 INFO L78 Accepts]: Start accepts. Automaton has 109645 states and 166690 transitions. Word has length 1084 [2022-11-23 14:24:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:03,326 INFO L495 AbstractCegarLoop]: Abstraction has 109645 states and 166690 transitions. [2022-11-23 14:24:03,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2022-11-23 14:24:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 109645 states and 166690 transitions. [2022-11-23 14:24:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2022-11-23 14:24:03,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:03,444 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:03,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-23 14:24:03,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:24:03,645 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash 491677473, now seen corresponding path program 1 times [2022-11-23 14:24:03,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:03,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447286808] [2022-11-23 14:24:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:04,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:24:04,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306108494] [2022-11-23 14:24:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:04,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:04,327 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:04,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:24:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 11224 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:24:08,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18669 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18669 trivial. 0 not checked. [2022-11-23 14:24:11,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:24:11,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447286808] [2022-11-23 14:24:11,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:24:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306108494] [2022-11-23 14:24:11,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306108494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:11,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:11,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:24:11,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32664467] [2022-11-23 14:24:11,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:11,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:11,464 INFO L87 Difference]: Start difference. First operand 109645 states and 166690 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2022-11-23 14:24:13,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:24:17,892 WARN L539 Checker$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 14:24:19,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:24:21,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:24:23,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:24:26,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:24:31,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:24:32,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:24:35,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:24:37,934 WARN L539 Checker$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 14:24:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:41,934 INFO L93 Difference]: Finished difference Result 153683 states and 233840 transitions. [2022-11-23 14:24:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 1069 [2022-11-23 14:24:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:42,570 INFO L225 Difference]: With dead ends: 153683 [2022-11-23 14:24:42,570 INFO L226 Difference]: Without dead ends: 153448 [2022-11-23 14:24:42,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1067 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 14:24:42,632 INFO L413 NwaCegarLoop]: 3091 mSDtfsCounter, 2510 mSDsluCounter, 2461 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2510 SdHoareTripleChecker+Valid, 5552 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:42,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2510 Valid, 5552 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 658 Invalid, 5 Unknown, 0 Unchecked, 27.3s Time] [2022-11-23 14:24:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153448 states. [2022-11-23 14:24:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153448 to 151693. [2022-11-23 14:24:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151693 states, 109875 states have (on average 1.4607144482366325) internal successors, (160496), 110942 states have internal predecessors, (160496), 33854 states have call successors, (33854), 7956 states have call predecessors, (33854), 7963 states have return successors, (36520), 33557 states have call predecessors, (36520), 33853 states have call successors, (36520) [2022-11-23 14:24:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151693 states to 151693 states and 230870 transitions. [2022-11-23 14:24:48,457 INFO L78 Accepts]: Start accepts. Automaton has 151693 states and 230870 transitions. Word has length 1069 [2022-11-23 14:24:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:48,458 INFO L495 AbstractCegarLoop]: Abstraction has 151693 states and 230870 transitions. [2022-11-23 14:24:48,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2022-11-23 14:24:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 151693 states and 230870 transitions. [2022-11-23 14:24:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2022-11-23 14:24:48,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:48,610 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:48,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 14:24:48,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:48,811 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash 406110738, now seen corresponding path program 1 times [2022-11-23 14:24:48,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:48,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196826603] [2022-11-23 14:24:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:48,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18636 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 18597 trivial. 0 not checked. [2022-11-23 14:24:50,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196826603] [2022-11-23 14:24:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196826603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120451613] [2022-11-23 14:24:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:50,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:50,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:50,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:50,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_190d6354-065c-45e1-a1c6-ec9153a710d2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process