./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-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS --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 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- 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-8393723 [2022-11-19 07:21:59,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:21:59,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:21:59,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:21:59,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:21:59,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:21:59,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:21:59,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:21:59,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:21:59,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:21:59,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:21:59,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:21:59,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:21:59,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:21:59,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:21:59,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:21:59,926 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:21:59,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:21:59,929 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:21:59,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:21:59,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:21:59,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:21:59,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:21:59,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:21:59,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:21:59,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:21:59,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:21:59,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:21:59,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:21:59,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:21:59,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:21:59,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:21:59,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:21:59,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:21:59,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:21:59,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:21:59,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:21:59,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:21:59,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:21:59,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:21:59,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:21:59,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:22:00,001 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:22:00,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:22:00,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:22:00,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:22:00,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:22:00,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:22:00,003 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:22:00,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:22:00,003 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:22:00,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:22:00,004 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:22:00,004 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:22:00,004 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:22:00,005 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:22:00,005 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:22:00,005 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:22:00,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:22:00,006 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:22:00,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:22:00,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:22:00,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:22:00,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:22:00,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:22:00,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:22:00,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:22:00,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:22:00,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:22:00,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:22:00,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:22:00,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:22:00,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:22:00,016 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:22:00,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:22:00,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:22:00,017 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:22:00,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:22:00,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:22:00,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:22:00,019 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_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2022-11-19 07:22:00,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:22:00,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:22:00,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:22:00,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:22:00,320 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:22:00,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-19 07:22:00,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/data/1f392c73a/afd9ddbf86d34d7c98f2c9375a9d35ab/FLAGabf4949b4 [2022-11-19 07:22:01,114 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:22:01,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-19 07:22:01,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/data/1f392c73a/afd9ddbf86d34d7c98f2c9375a9d35ab/FLAGabf4949b4 [2022-11-19 07:22:01,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/data/1f392c73a/afd9ddbf86d34d7c98f2c9375a9d35ab [2022-11-19 07:22:01,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:22:01,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:22:01,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:22:01,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:22:01,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:22:01,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:22:01" (1/1) ... [2022-11-19 07:22:01,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fbd043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:01, skipping insertion in model container [2022-11-19 07:22:01,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:22:01" (1/1) ... [2022-11-19 07:22:01,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:22:01,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:22:03,116 WARN L234 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_adce4c80-26e5-4385-8e6b-cd9b51dff167/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-19 07:22:03,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:22:03,284 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:22:03,669 WARN L234 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_adce4c80-26e5-4385-8e6b-cd9b51dff167/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2022-11-19 07:22:03,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:22:03,791 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:22:03,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03 WrapperNode [2022-11-19 07:22:03,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:22:03,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:22:03,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:22:03,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:22:03,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:03,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,011 INFO L138 Inliner]: procedures = 221, calls = 1639, calls flagged for inlining = 84, calls inlined = 76, statements flattened = 4484 [2022-11-19 07:22:04,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:22:04,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:22:04,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:22:04,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:22:04,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:22:04,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:22:04,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:22:04,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:22:04,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (1/1) ... [2022-11-19 07:22:04,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:22:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:04,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:22:04,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:22:04,391 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_get_mode [2022-11-19 07:22:04,391 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_get_mode [2022-11-19 07:22:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2022-11-19 07:22:04,392 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2022-11-19 07:22:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:22:04,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:22:04,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:22:04,392 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:22:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-19 07:22:04,393 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-19 07:22:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_format [2022-11-19 07:22:04,393 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_format [2022-11-19 07:22:04,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:22:04,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:22:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure raid_io_hints [2022-11-19 07:22:04,394 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_io_hints [2022-11-19 07:22:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure raid_message [2022-11-19 07:22:04,394 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_message [2022-11-19 07:22:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:22:04,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:22:04,394 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 07:22:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 07:22:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_copies [2022-11-19 07:22:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_copies [2022-11-19 07:22:04,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:22:04,395 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:22:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:22:04,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:22:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure context_free [2022-11-19 07:22:04,396 INFO L138 BoogieDeclarations]: Found implementation of procedure context_free [2022-11-19 07:22:04,396 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-19 07:22:04,397 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-19 07:22:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-19 07:22:04,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-19 07:22:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure super_validate [2022-11-19 07:22:04,397 INFO L138 BoogieDeclarations]: Found implementation of procedure super_validate [2022-11-19 07:22:04,397 INFO L130 BoogieDeclarations]: Found specification of procedure do_table_event [2022-11-19 07:22:04,398 INFO L138 BoogieDeclarations]: Found implementation of procedure do_table_event [2022-11-19 07:22:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:22:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 07:22:04,398 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 07:22:04,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:22:04,399 INFO L130 BoogieDeclarations]: Found specification of procedure sync_page_io [2022-11-19 07:22:04,399 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_page_io [2022-11-19 07:22:04,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 07:22:04,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 07:22:04,400 INFO L130 BoogieDeclarations]: Found specification of procedure to_sector [2022-11-19 07:22:04,401 INFO L138 BoogieDeclarations]: Found implementation of procedure to_sector [2022-11-19 07:22:04,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:22:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:22:04,402 INFO L130 BoogieDeclarations]: Found specification of procedure raid_iterate_devices [2022-11-19 07:22:04,403 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_iterate_devices [2022-11-19 07:22:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2022-11-19 07:22:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2022-11-19 07:22:04,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2022-11-19 07:22:04,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2022-11-19 07:22:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:22:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure mddev_suspend [2022-11-19 07:22:04,405 INFO L138 BoogieDeclarations]: Found implementation of procedure mddev_suspend [2022-11-19 07:22:04,405 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 07:22:04,406 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 07:22:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure super_sync [2022-11-19 07:22:04,406 INFO L138 BoogieDeclarations]: Found implementation of procedure super_sync [2022-11-19 07:22:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:22:04,406 INFO L130 BoogieDeclarations]: Found specification of procedure is_power_of_2 [2022-11-19 07:22:04,407 INFO L138 BoogieDeclarations]: Found implementation of procedure is_power_of_2 [2022-11-19 07:22:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2022-11-19 07:22:04,407 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2022-11-19 07:22:04,407 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 07:22:04,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 07:22:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:22:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure raid_merge [2022-11-19 07:22:04,408 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_merge [2022-11-19 07:22:04,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 07:22:04,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 07:22:04,409 INFO L130 BoogieDeclarations]: Found specification of procedure raid_map [2022-11-19 07:22:04,409 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_map [2022-11-19 07:22:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:22:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:22:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2022-11-19 07:22:04,410 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2022-11-19 07:22:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure md_stop [2022-11-19 07:22:04,411 INFO L138 BoogieDeclarations]: Found implementation of procedure md_stop [2022-11-19 07:22:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure raid_status [2022-11-19 07:22:04,412 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_status [2022-11-19 07:22:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2022-11-19 07:22:04,412 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2022-11-19 07:22:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:22:04,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:22:04,413 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 07:22:04,413 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 07:22:04,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:22:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure raid_dtr [2022-11-19 07:22:04,415 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_dtr [2022-11-19 07:22:04,415 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2022-11-19 07:22:04,415 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2022-11-19 07:22:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:22:04,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:22:04,416 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-19 07:22:04,416 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-19 07:22:05,118 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:22:05,123 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:22:05,578 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:22:08,784 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:22:09,949 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:22:09,949 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:22:09,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:22:09 BoogieIcfgContainer [2022-11-19 07:22:09,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:22:09,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:22:09,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:22:09,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:22:09,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:22:01" (1/3) ... [2022-11-19 07:22:09,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5f4a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:22:09, skipping insertion in model container [2022-11-19 07:22:09,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:22:03" (2/3) ... [2022-11-19 07:22:09,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5f4a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:22:09, skipping insertion in model container [2022-11-19 07:22:09,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:22:09" (3/3) ... [2022-11-19 07:22:09,974 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2022-11-19 07:22:09,998 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:22:09,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:22:10,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:22:10,126 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;@67f2e2af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:22:10,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:22:10,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 874 states, 613 states have (on average 1.468189233278956) internal successors, (900), 634 states have internal predecessors, (900), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-19 07:22:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-19 07:22:10,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:10,151 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:10,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2125418704, now seen corresponding path program 1 times [2022-11-19 07:22:10,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:10,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538634147] [2022-11-19 07:22:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-19 07:22:11,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:11,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538634147] [2022-11-19 07:22:11,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538634147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:11,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:11,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613662751] [2022-11-19 07:22:11,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:11,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:11,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:11,313 INFO L87 Difference]: Start difference. First operand has 874 states, 613 states have (on average 1.468189233278956) internal successors, (900), 634 states have internal predecessors, (900), 216 states have call successors, (216), 44 states have call predecessors, (216), 43 states have return successors, (212), 208 states have call predecessors, (212), 212 states have call successors, (212) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-19 07:22:15,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:15,365 INFO L93 Difference]: Finished difference Result 2528 states and 3855 transitions. [2022-11-19 07:22:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 170 [2022-11-19 07:22:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:15,390 INFO L225 Difference]: With dead ends: 2528 [2022-11-19 07:22:15,391 INFO L226 Difference]: Without dead ends: 1675 [2022-11-19 07:22:15,399 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 [2022-11-19 07:22:15,402 INFO L413 NwaCegarLoop]: 1377 mSDtfsCounter, 1237 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:15,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 2558 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 07:22:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-11-19 07:22:15,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1672. [2022-11-19 07:22:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1190 states have (on average 1.464705882352941) internal successors, (1743), 1216 states have internal predecessors, (1743), 400 states have call successors, (400), 82 states have call predecessors, (400), 81 states have return successors, (395), 387 states have call predecessors, (395), 395 states have call successors, (395) [2022-11-19 07:22:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2538 transitions. [2022-11-19 07:22:15,577 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2538 transitions. Word has length 170 [2022-11-19 07:22:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:15,580 INFO L495 AbstractCegarLoop]: Abstraction has 1672 states and 2538 transitions. [2022-11-19 07:22:15,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-19 07:22:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2538 transitions. [2022-11-19 07:22:15,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:22:15,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:15,598 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:15,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:22:15,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1312276320, now seen corresponding path program 1 times [2022-11-19 07:22:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:15,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687611160] [2022-11-19 07:22:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-19 07:22:16,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:16,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687611160] [2022-11-19 07:22:16,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687611160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:16,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:16,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:16,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894165626] [2022-11-19 07:22:16,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:16,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:16,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:16,010 INFO L87 Difference]: Start difference. First operand 1672 states and 2538 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:18,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:19,287 INFO L93 Difference]: Finished difference Result 1674 states and 2539 transitions. [2022-11-19 07:22:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 173 [2022-11-19 07:22:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:19,297 INFO L225 Difference]: With dead ends: 1674 [2022-11-19 07:22:19,297 INFO L226 Difference]: Without dead ends: 1671 [2022-11-19 07:22:19,299 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 [2022-11-19 07:22:19,300 INFO L413 NwaCegarLoop]: 1173 mSDtfsCounter, 1262 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:19,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 1173 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:22:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-11-19 07:22:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1671. [2022-11-19 07:22:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1190 states have (on average 1.4638655462184873) internal successors, (1742), 1215 states have internal predecessors, (1742), 399 states have call successors, (399), 82 states have call predecessors, (399), 81 states have return successors, (395), 387 states have call predecessors, (395), 395 states have call successors, (395) [2022-11-19 07:22:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2536 transitions. [2022-11-19 07:22:19,404 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2536 transitions. Word has length 173 [2022-11-19 07:22:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:19,405 INFO L495 AbstractCegarLoop]: Abstraction has 1671 states and 2536 transitions. [2022-11-19 07:22:19,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2536 transitions. [2022-11-19 07:22:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-19 07:22:19,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:19,410 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:22:19,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2025564934, now seen corresponding path program 1 times [2022-11-19 07:22:19,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:19,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139749270] [2022-11-19 07:22:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:19,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-19 07:22:19,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:19,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139749270] [2022-11-19 07:22:19,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139749270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:19,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:19,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531012663] [2022-11-19 07:22:19,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:19,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:19,769 INFO L87 Difference]: Start difference. First operand 1671 states and 2536 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:21,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:24,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:25,836 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 [] [2022-11-19 07:22:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:26,370 INFO L93 Difference]: Finished difference Result 3291 states and 4996 transitions. [2022-11-19 07:22:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 174 [2022-11-19 07:22:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:26,392 INFO L225 Difference]: With dead ends: 3291 [2022-11-19 07:22:26,392 INFO L226 Difference]: Without dead ends: 3288 [2022-11-19 07:22:26,397 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 [2022-11-19 07:22:26,399 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 1251 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 2485 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:26,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 2485 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-19 07:22:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-11-19 07:22:26,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3285. [2022-11-19 07:22:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 2347 states have (on average 1.4669791222837665) internal successors, (3443), 2394 states have internal predecessors, (3443), 776 states have call successors, (776), 162 states have call predecessors, (776), 161 states have return successors, (772), 756 states have call predecessors, (772), 772 states have call successors, (772) [2022-11-19 07:22:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 4991 transitions. [2022-11-19 07:22:26,647 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 4991 transitions. Word has length 174 [2022-11-19 07:22:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:26,649 INFO L495 AbstractCegarLoop]: Abstraction has 3285 states and 4991 transitions. [2022-11-19 07:22:26,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 4991 transitions. [2022-11-19 07:22:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-19 07:22:26,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:26,654 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:26,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:22:26,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:26,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1632286941, now seen corresponding path program 1 times [2022-11-19 07:22:26,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:26,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226864397] [2022-11-19 07:22:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:26,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-19 07:22:26,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:26,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226864397] [2022-11-19 07:22:26,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226864397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:26,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:26,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164463261] [2022-11-19 07:22:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:26,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:26,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:26,995 INFO L87 Difference]: Start difference. First operand 3285 states and 4991 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:28,887 INFO L93 Difference]: Finished difference Result 3287 states and 4992 transitions. [2022-11-19 07:22:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2022-11-19 07:22:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:28,910 INFO L225 Difference]: With dead ends: 3287 [2022-11-19 07:22:28,911 INFO L226 Difference]: Without dead ends: 3284 [2022-11-19 07:22:28,913 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 [2022-11-19 07:22:28,917 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 1262 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:28,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 1171 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 07:22:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2022-11-19 07:22:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 3284. [2022-11-19 07:22:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2347 states have (on average 1.4665530464422667) internal successors, (3442), 2393 states have internal predecessors, (3442), 775 states have call successors, (775), 162 states have call predecessors, (775), 161 states have return successors, (772), 756 states have call predecessors, (772), 772 states have call successors, (772) [2022-11-19 07:22:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4989 transitions. [2022-11-19 07:22:29,146 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4989 transitions. Word has length 175 [2022-11-19 07:22:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:29,147 INFO L495 AbstractCegarLoop]: Abstraction has 3284 states and 4989 transitions. [2022-11-19 07:22:29,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4989 transitions. [2022-11-19 07:22:29,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-19 07:22:29,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:29,150 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:22:29,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 938426793, now seen corresponding path program 1 times [2022-11-19 07:22:29,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:29,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033592435] [2022-11-19 07:22:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2022-11-19 07:22:29,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:29,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033592435] [2022-11-19 07:22:29,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033592435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:29,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:29,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:29,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119023211] [2022-11-19 07:22:29,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:29,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:29,412 INFO L87 Difference]: Start difference. First operand 3284 states and 4989 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:34,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:34,991 INFO L93 Difference]: Finished difference Result 4882 states and 7421 transitions. [2022-11-19 07:22:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 176 [2022-11-19 07:22:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:35,016 INFO L225 Difference]: With dead ends: 4882 [2022-11-19 07:22:35,016 INFO L226 Difference]: Without dead ends: 4873 [2022-11-19 07:22:35,020 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 [2022-11-19 07:22:35,022 INFO L413 NwaCegarLoop]: 1360 mSDtfsCounter, 1227 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:35,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 2484 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-19 07:22:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2022-11-19 07:22:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4873. [2022-11-19 07:22:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 3489 states have (on average 1.4671825738033821) internal successors, (5119), 3555 states have internal predecessors, (5119), 1146 states have call successors, (1146), 240 states have call predecessors, (1146), 237 states have return successors, (1143), 1117 states have call predecessors, (1143), 1143 states have call successors, (1143) [2022-11-19 07:22:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7408 transitions. [2022-11-19 07:22:35,373 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7408 transitions. Word has length 176 [2022-11-19 07:22:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:35,373 INFO L495 AbstractCegarLoop]: Abstraction has 4873 states and 7408 transitions. [2022-11-19 07:22:35,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:22:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7408 transitions. [2022-11-19 07:22:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-19 07:22:35,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:35,386 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:35,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:22:35,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1908105645, now seen corresponding path program 1 times [2022-11-19 07:22:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:35,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840640063] [2022-11-19 07:22:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:35,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:35,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:35,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840640063] [2022-11-19 07:22:35,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 07:22:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216921820] [2022-11-19 07:22:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:35,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:35,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:35,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:35,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:22:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 3649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:22:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-11-19 07:22:36,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:36,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216921820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:36,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:36,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:36,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871369430] [2022-11-19 07:22:36,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:36,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:36,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:36,845 INFO L87 Difference]: Start difference. First operand 4873 states and 7408 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-19 07:22:41,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:42,247 INFO L93 Difference]: Finished difference Result 10258 states and 15721 transitions. [2022-11-19 07:22:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 250 [2022-11-19 07:22:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:42,274 INFO L225 Difference]: With dead ends: 10258 [2022-11-19 07:22:42,274 INFO L226 Difference]: Without dead ends: 5420 [2022-11-19 07:22:42,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:42,291 INFO L413 NwaCegarLoop]: 1152 mSDtfsCounter, 183 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2169 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:42,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 2169 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 407 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 07:22:42,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5420 states. [2022-11-19 07:22:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5420 to 5408. [2022-11-19 07:22:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5408 states, 3988 states have (on average 1.4528585757271815) internal successors, (5794), 4054 states have internal predecessors, (5794), 1172 states have call successors, (1172), 250 states have call predecessors, (1172), 247 states have return successors, (1169), 1143 states have call predecessors, (1169), 1169 states have call successors, (1169) [2022-11-19 07:22:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 8135 transitions. [2022-11-19 07:22:42,609 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 8135 transitions. Word has length 250 [2022-11-19 07:22:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:42,609 INFO L495 AbstractCegarLoop]: Abstraction has 5408 states and 8135 transitions. [2022-11-19 07:22:42,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-19 07:22:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 8135 transitions. [2022-11-19 07:22:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-19 07:22:42,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:42,623 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-19 07:22:42,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:22:42,834 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1564717028, now seen corresponding path program 1 times [2022-11-19 07:22:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130412463] [2022-11-19 07:22:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:42,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:22:42,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982249586] [2022-11-19 07:22:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:42,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:42,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:42,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:43,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:22:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:44,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 3763 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:22:44,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:22:44,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:44,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:44,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130412463] [2022-11-19 07:22:44,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:22:44,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982249586] [2022-11-19 07:22:44,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982249586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:44,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:44,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:22:44,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121722609] [2022-11-19 07:22:44,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:44,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:22:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:44,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:22:44,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:22:44,249 INFO L87 Difference]: Start difference. First operand 5408 states and 8135 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:22:47,145 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 [] [2022-11-19 07:22:53,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:54,903 INFO L93 Difference]: Finished difference Result 15330 states and 23399 transitions. [2022-11-19 07:22:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:22:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 271 [2022-11-19 07:22:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:54,959 INFO L225 Difference]: With dead ends: 15330 [2022-11-19 07:22:54,959 INFO L226 Difference]: Without dead ends: 9970 [2022-11-19 07:22:54,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:54,983 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 886 mSDsluCounter, 2975 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 124 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 4629 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:54,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 4629 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 475 Invalid, 1 Unknown, 0 Unchecked, 10.1s Time] [2022-11-19 07:22:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9970 states. [2022-11-19 07:22:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9970 to 5420. [2022-11-19 07:22:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 4000 states have (on average 1.4515) internal successors, (5806), 4066 states have internal predecessors, (5806), 1172 states have call successors, (1172), 250 states have call predecessors, (1172), 247 states have return successors, (1169), 1143 states have call predecessors, (1169), 1169 states have call successors, (1169) [2022-11-19 07:22:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 8147 transitions. [2022-11-19 07:22:55,487 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 8147 transitions. Word has length 271 [2022-11-19 07:22:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 5420 states and 8147 transitions. [2022-11-19 07:22:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:22:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 8147 transitions. [2022-11-19 07:22:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-19 07:22:55,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:55,501 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-19 07:22:55,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:55,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:55,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash -498027281, now seen corresponding path program 1 times [2022-11-19 07:22:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:55,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112211161] [2022-11-19 07:22:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:55,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:22:55,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125239674] [2022-11-19 07:22:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:55,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:55,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:22:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 3914 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:22:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:22:57,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:57,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:57,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112211161] [2022-11-19 07:22:57,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:22:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125239674] [2022-11-19 07:22:57,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125239674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:57,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:57,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:22:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168662059] [2022-11-19 07:22:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:22:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:22:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:22:57,186 INFO L87 Difference]: Start difference. First operand 5420 states and 8147 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:22:59,215 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 [] [2022-11-19 07:23:01,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:05,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:06,625 INFO L93 Difference]: Finished difference Result 15990 states and 24491 transitions. [2022-11-19 07:23:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:23:06,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 284 [2022-11-19 07:23:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:06,673 INFO L225 Difference]: With dead ends: 15990 [2022-11-19 07:23:06,674 INFO L226 Difference]: Without dead ends: 10618 [2022-11-19 07:23:06,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:06,693 INFO L413 NwaCegarLoop]: 1814 mSDtfsCounter, 1019 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 103 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 4988 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:06,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 4988 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 503 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-11-19 07:23:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10618 states. [2022-11-19 07:23:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10618 to 5432. [2022-11-19 07:23:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 4012 states have (on average 1.4501495513459621) internal successors, (5818), 4078 states have internal predecessors, (5818), 1172 states have call successors, (1172), 250 states have call predecessors, (1172), 247 states have return successors, (1169), 1143 states have call predecessors, (1169), 1169 states have call successors, (1169) [2022-11-19 07:23:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 8159 transitions. [2022-11-19 07:23:07,154 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 8159 transitions. Word has length 284 [2022-11-19 07:23:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:07,155 INFO L495 AbstractCegarLoop]: Abstraction has 5432 states and 8159 transitions. [2022-11-19 07:23:07,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:23:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 8159 transitions. [2022-11-19 07:23:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-19 07:23:07,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:07,170 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-19 07:23:07,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:07,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:07,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:07,388 INFO L85 PathProgramCache]: Analyzing trace with hash 260966451, now seen corresponding path program 1 times [2022-11-19 07:23:07,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:07,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914636005] [2022-11-19 07:23:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:07,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:07,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:23:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678926008] [2022-11-19 07:23:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:07,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:07,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:07,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:23:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:08,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 3930 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:23:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:23:08,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:08,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:08,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914636005] [2022-11-19 07:23:08,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:23:08,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678926008] [2022-11-19 07:23:08,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678926008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:08,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:08,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:08,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060109187] [2022-11-19 07:23:08,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:08,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:08,834 INFO L87 Difference]: Start difference. First operand 5432 states and 8159 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:23:10,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:12,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:15,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:16,213 INFO L93 Difference]: Finished difference Result 14115 states and 21551 transitions. [2022-11-19 07:23:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 284 [2022-11-19 07:23:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:16,250 INFO L225 Difference]: With dead ends: 14115 [2022-11-19 07:23:16,251 INFO L226 Difference]: Without dead ends: 8731 [2022-11-19 07:23:16,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:16,340 INFO L413 NwaCegarLoop]: 1706 mSDtfsCounter, 547 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:16,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 2953 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 07:23:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8731 states. [2022-11-19 07:23:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8731 to 5546. [2022-11-19 07:23:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 4102 states have (on average 1.4505119453924915) internal successors, (5950), 4168 states have internal predecessors, (5950), 1196 states have call successors, (1196), 250 states have call predecessors, (1196), 247 states have return successors, (1193), 1167 states have call predecessors, (1193), 1193 states have call successors, (1193) [2022-11-19 07:23:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 8339 transitions. [2022-11-19 07:23:16,790 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 8339 transitions. Word has length 284 [2022-11-19 07:23:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:16,791 INFO L495 AbstractCegarLoop]: Abstraction has 5546 states and 8339 transitions. [2022-11-19 07:23:16,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:23:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 8339 transitions. [2022-11-19 07:23:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-11-19 07:23:16,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:16,803 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 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] [2022-11-19 07:23:16,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:17,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -281174297, now seen corresponding path program 1 times [2022-11-19 07:23:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996764724] [2022-11-19 07:23:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:17,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:23:17,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864464049] [2022-11-19 07:23:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:17,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:17,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:17,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:17,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:23:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:18,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 3902 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:23:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:23:18,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:18,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996764724] [2022-11-19 07:23:18,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:23:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864464049] [2022-11-19 07:23:18,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864464049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:18,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:18,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:23:18,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503545984] [2022-11-19 07:23:18,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:23:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:23:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:23:18,481 INFO L87 Difference]: Start difference. First operand 5546 states and 8339 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:23:20,192 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 [] [2022-11-19 07:23:21,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:22,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:23,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:28,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:29,827 INFO L93 Difference]: Finished difference Result 14789 states and 22697 transitions. [2022-11-19 07:23:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:23:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 285 [2022-11-19 07:23:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:29,864 INFO L225 Difference]: With dead ends: 14789 [2022-11-19 07:23:29,864 INFO L226 Difference]: Without dead ends: 11050 [2022-11-19 07:23:29,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:29,877 INFO L413 NwaCegarLoop]: 1838 mSDtfsCounter, 1069 mSDsluCounter, 3209 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 5047 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:29,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 5047 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-11-19 07:23:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11050 states. [2022-11-19 07:23:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11050 to 5558. [2022-11-19 07:23:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 4114 states have (on average 1.4491978609625669) internal successors, (5962), 4180 states have internal predecessors, (5962), 1196 states have call successors, (1196), 250 states have call predecessors, (1196), 247 states have return successors, (1193), 1167 states have call predecessors, (1193), 1193 states have call successors, (1193) [2022-11-19 07:23:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 8351 transitions. [2022-11-19 07:23:30,420 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 8351 transitions. Word has length 285 [2022-11-19 07:23:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 5558 states and 8351 transitions. [2022-11-19 07:23:30,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 07:23:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 8351 transitions. [2022-11-19 07:23:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-19 07:23:30,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:30,431 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-19 07:23:30,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:30,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2066209148, now seen corresponding path program 1 times [2022-11-19 07:23:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:30,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958028461] [2022-11-19 07:23:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:30,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:23:31,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:31,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958028461] [2022-11-19 07:23:31,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958028461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:23:31,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320232635] [2022-11-19 07:23:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:31,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:31,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:31,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:31,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:23:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:33,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 3948 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:23:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2022-11-19 07:23:33,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:33,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320232635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:33,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:23:33,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-19 07:23:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152146457] [2022-11-19 07:23:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:33,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:33,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:23:33,483 INFO L87 Difference]: Start difference. First operand 5558 states and 8351 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-19 07:23:35,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:37,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:40,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:47,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:49,777 INFO L93 Difference]: Finished difference Result 12169 states and 18359 transitions. [2022-11-19 07:23:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:23:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 286 [2022-11-19 07:23:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:49,821 INFO L225 Difference]: With dead ends: 12169 [2022-11-19 07:23:49,821 INFO L226 Difference]: Without dead ends: 12161 [2022-11-19 07:23:49,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:23:49,827 INFO L413 NwaCegarLoop]: 2475 mSDtfsCounter, 3086 mSDsluCounter, 3917 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 112 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3135 SdHoareTripleChecker+Valid, 6392 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:49,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3135 Valid, 6392 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2274 Invalid, 2 Unknown, 0 Unchecked, 15.4s Time] [2022-11-19 07:23:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12161 states. [2022-11-19 07:23:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12161 to 11023. [2022-11-19 07:23:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11023 states, 8164 states have (on average 1.4514943655071044) internal successors, (11850), 8312 states have internal predecessors, (11850), 2369 states have call successors, (2369), 494 states have call predecessors, (2369), 489 states have return successors, (2366), 2296 states have call predecessors, (2366), 2366 states have call successors, (2366) [2022-11-19 07:23:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11023 states to 11023 states and 16585 transitions. [2022-11-19 07:23:50,946 INFO L78 Accepts]: Start accepts. Automaton has 11023 states and 16585 transitions. Word has length 286 [2022-11-19 07:23:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:50,947 INFO L495 AbstractCegarLoop]: Abstraction has 11023 states and 16585 transitions. [2022-11-19 07:23:50,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-19 07:23:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 11023 states and 16585 transitions. [2022-11-19 07:23:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-11-19 07:23:50,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:50,965 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-19 07:23:50,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:23:51,178 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:51,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash -675387117, now seen corresponding path program 1 times [2022-11-19 07:23:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:51,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113812577] [2022-11-19 07:23:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:51,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:23:51,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113812577] [2022-11-19 07:23:51,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113812577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:51,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:51,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173799892] [2022-11-19 07:23:51,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:51,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:51,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:51,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:51,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:51,853 INFO L87 Difference]: Start difference. First operand 11023 states and 16585 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 07:23:52,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:55,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:00,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:00,575 INFO L93 Difference]: Finished difference Result 28870 states and 44133 transitions. [2022-11-19 07:24:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 287 [2022-11-19 07:24:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:00,636 INFO L225 Difference]: With dead ends: 28870 [2022-11-19 07:24:00,636 INFO L226 Difference]: Without dead ends: 17895 [2022-11-19 07:24:00,672 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 [2022-11-19 07:24:00,673 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 560 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 2737 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:00,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 2737 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-19 07:24:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17895 states. [2022-11-19 07:24:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17895 to 11035. [2022-11-19 07:24:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11035 states, 8176 states have (on average 1.4508317025440314) internal successors, (11862), 8324 states have internal predecessors, (11862), 2369 states have call successors, (2369), 494 states have call predecessors, (2369), 489 states have return successors, (2366), 2296 states have call predecessors, (2366), 2366 states have call successors, (2366) [2022-11-19 07:24:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11035 states to 11035 states and 16597 transitions. [2022-11-19 07:24:01,879 INFO L78 Accepts]: Start accepts. Automaton has 11035 states and 16597 transitions. Word has length 287 [2022-11-19 07:24:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:01,880 INFO L495 AbstractCegarLoop]: Abstraction has 11035 states and 16597 transitions. [2022-11-19 07:24:01,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 07:24:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 11035 states and 16597 transitions. [2022-11-19 07:24:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-19 07:24:01,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:01,900 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-19 07:24:01,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:24:01,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:01,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1882881665, now seen corresponding path program 1 times [2022-11-19 07:24:01,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:01,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313789073] [2022-11-19 07:24:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:01,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:24:06,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313789073] [2022-11-19 07:24:06,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313789073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:06,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:06,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-19 07:24:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240792483] [2022-11-19 07:24:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:06,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:24:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:24:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:24:06,307 INFO L87 Difference]: Start difference. First operand 11035 states and 16597 transitions. Second operand has 12 states, 7 states have (on average 16.714285714285715) internal successors, (117), 9 states have internal predecessors, (117), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-19 07:24:07,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:09,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:10,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:11,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:13,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:15,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:17,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:19,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:32,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:34,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:36,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:38,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:39,211 INFO L93 Difference]: Finished difference Result 28742 states and 43742 transitions. [2022-11-19 07:24:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:24:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 16.714285714285715) internal successors, (117), 9 states have internal predecessors, (117), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) Word has length 288 [2022-11-19 07:24:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:39,270 INFO L225 Difference]: With dead ends: 28742 [2022-11-19 07:24:39,271 INFO L226 Difference]: Without dead ends: 17755 [2022-11-19 07:24:39,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:24:39,302 INFO L413 NwaCegarLoop]: 1574 mSDtfsCounter, 884 mSDsluCounter, 15191 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 149 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 16765 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:39,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 16765 Invalid, 1905 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [149 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 31.3s Time] [2022-11-19 07:24:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17755 states. [2022-11-19 07:24:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17755 to 11083. [2022-11-19 07:24:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11083 states, 8212 states have (on average 1.4488553336580614) internal successors, (11898), 8360 states have internal predecessors, (11898), 2381 states have call successors, (2381), 494 states have call predecessors, (2381), 489 states have return successors, (2378), 2308 states have call predecessors, (2378), 2378 states have call successors, (2378) [2022-11-19 07:24:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11083 states to 11083 states and 16657 transitions. [2022-11-19 07:24:40,577 INFO L78 Accepts]: Start accepts. Automaton has 11083 states and 16657 transitions. Word has length 288 [2022-11-19 07:24:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:40,578 INFO L495 AbstractCegarLoop]: Abstraction has 11083 states and 16657 transitions. [2022-11-19 07:24:40,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 16.714285714285715) internal successors, (117), 9 states have internal predecessors, (117), 4 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-19 07:24:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 11083 states and 16657 transitions. [2022-11-19 07:24:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-11-19 07:24:40,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:40,595 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-19 07:24:40,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:24:40,596 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1583589524, now seen corresponding path program 1 times [2022-11-19 07:24:40,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:40,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584474885] [2022-11-19 07:24:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:24:42,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:42,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584474885] [2022-11-19 07:24:42,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584474885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:42,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:42,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:24:42,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592608104] [2022-11-19 07:24:42,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:42,763 INFO L87 Difference]: Start difference. First operand 11083 states and 16657 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 07:24:44,006 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 [] [2022-11-19 07:24:45,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:53,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:54,139 INFO L93 Difference]: Finished difference Result 28952 states and 44231 transitions. [2022-11-19 07:24:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 292 [2022-11-19 07:24:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:54,192 INFO L225 Difference]: With dead ends: 28952 [2022-11-19 07:24:54,193 INFO L226 Difference]: Without dead ends: 17917 [2022-11-19 07:24:54,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:54,223 INFO L413 NwaCegarLoop]: 1556 mSDtfsCounter, 545 mSDsluCounter, 4328 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 5884 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:54,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 5884 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 585 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2022-11-19 07:24:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17917 states. [2022-11-19 07:24:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17917 to 11131. [2022-11-19 07:24:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11131 states, 8248 states have (on average 1.4468962172647915) internal successors, (11934), 8396 states have internal predecessors, (11934), 2381 states have call successors, (2381), 494 states have call predecessors, (2381), 501 states have return successors, (2414), 2320 states have call predecessors, (2414), 2378 states have call successors, (2414) [2022-11-19 07:24:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11131 states to 11131 states and 16729 transitions. [2022-11-19 07:24:55,624 INFO L78 Accepts]: Start accepts. Automaton has 11131 states and 16729 transitions. Word has length 292 [2022-11-19 07:24:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:55,625 INFO L495 AbstractCegarLoop]: Abstraction has 11131 states and 16729 transitions. [2022-11-19 07:24:55,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 07:24:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 11131 states and 16729 transitions. [2022-11-19 07:24:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-19 07:24:55,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:55,644 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2022-11-19 07:24:55,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:24:55,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1304492135, now seen corresponding path program 1 times [2022-11-19 07:24:55,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:55,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775978024] [2022-11-19 07:24:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-11-19 07:24:59,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775978024] [2022-11-19 07:24:59,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775978024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:59,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:59,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-19 07:24:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614431462] [2022-11-19 07:24:59,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:59,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:24:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:24:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:24:59,561 INFO L87 Difference]: Start difference. First operand 11131 states and 16729 transitions. Second operand has 12 states, 7 states have (on average 17.428571428571427) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-19 07:25:00,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:04,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:07,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:10,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:17,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:25:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:19,236 INFO L93 Difference]: Finished difference Result 28934 states and 44006 transitions. [2022-11-19 07:25:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:25:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 17.428571428571427) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) Word has length 295 [2022-11-19 07:25:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:19,298 INFO L225 Difference]: With dead ends: 28934 [2022-11-19 07:25:19,298 INFO L226 Difference]: Without dead ends: 17851 [2022-11-19 07:25:19,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:25:19,330 INFO L413 NwaCegarLoop]: 1568 mSDtfsCounter, 888 mSDsluCounter, 15139 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 149 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 16707 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:19,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 16707 Invalid, 1914 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [149 Valid, 1762 Invalid, 3 Unknown, 0 Unchecked, 17.9s Time] [2022-11-19 07:25:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17851 states. [2022-11-19 07:25:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17851 to 11131. [2022-11-19 07:25:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11131 states, 8248 states have (on average 1.4468962172647915) internal successors, (11934), 8396 states have internal predecessors, (11934), 2381 states have call successors, (2381), 494 states have call predecessors, (2381), 501 states have return successors, (2414), 2320 states have call predecessors, (2414), 2378 states have call successors, (2414) [2022-11-19 07:25:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11131 states to 11131 states and 16729 transitions. [2022-11-19 07:25:20,450 INFO L78 Accepts]: Start accepts. Automaton has 11131 states and 16729 transitions. Word has length 295 [2022-11-19 07:25:20,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:20,451 INFO L495 AbstractCegarLoop]: Abstraction has 11131 states and 16729 transitions. [2022-11-19 07:25:20,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 17.428571428571427) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 5 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-19 07:25:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 11131 states and 16729 transitions. [2022-11-19 07:25:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-11-19 07:25:20,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:20,467 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2022-11-19 07:25:20,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:25:20,468 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2058910344, now seen corresponding path program 1 times [2022-11-19 07:25:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:20,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606327102] [2022-11-19 07:25:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-11-19 07:25:23,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606327102] [2022-11-19 07:25:23,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606327102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527309146] [2022-11-19 07:25:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:23,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:23,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:23,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:23,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adce4c80-26e5-4385-8e6b-cd9b51dff167/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:25:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:25,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 4172 conjuncts, 169 conjunts are in the unsatisfiable core [2022-11-19 07:25:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:25,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:25:25,563 INFO L321 Elim1Store]: treesize reduction 139, result has 24.9 percent of original size [2022-11-19 07:25:25,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 54 [2022-11-19 07:25:26,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:25:26,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:25:26,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:25:26,211 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:25:26,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:25:26,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 22 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 64 [2022-11-19 07:25:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 92 proven. 5 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2022-11-19 07:25:26,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:26,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527309146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:26,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316470407] [2022-11-19 07:25:26,923 INFO L159 IcfgInterpreter]: Started Sifa with 163 locations of interest [2022-11-19 07:25:26,923 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:26,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:26,932 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:26,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:31,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:31,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:31,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:31,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:31,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:25:32,963 INFO L217 Elim1Store]: Index analysis took 1843 ms [2022-11-19 07:29:25,510 WARN L233 SmtUtils]: Spent 3.87m on a formula simplification. DAG size of input: 4684 DAG size of output: 1949 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:29:25,524 INFO L321 Elim1Store]: treesize reduction 22320, result has 16.3 percent of original size [2022-11-19 07:29:25,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 165 select indices, 165 select index equivalence classes, 13544 disjoint index pairs (out of 13530 index pairs), introduced 165 new quantified variables, introduced 170 case distinctions, treesize of input 850 treesize of output 4840 [2022-11-19 07:29:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:42,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:52,502 INFO L217 Elim1Store]: Index analysis took 20502 ms