./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.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_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/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_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/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_ac1d9788-e6c0-4057-940a-38409e88f892/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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- 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 07:13:46,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:13:46,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:13:46,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:13:46,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:13:46,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:13:46,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:13:46,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:13:46,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:13:46,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:13:46,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:13:46,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:13:46,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:13:46,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:13:46,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:13:46,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:13:46,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:13:46,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:13:46,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:13:46,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:13:46,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:13:46,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:13:46,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:13:46,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:13:46,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:13:46,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:13:46,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:13:46,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:13:46,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:13:46,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:13:46,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:13:46,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:13:46,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:13:46,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:13:46,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:13:46,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:13:46,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:13:46,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:13:46,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:13:46,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:13:46,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:13:46,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:13:47,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:13:47,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:13:47,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:13:47,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:13:47,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:13:47,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:13:47,017 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:13:47,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:13:47,018 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:13:47,018 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:13:47,019 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:13:47,019 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:13:47,019 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:13:47,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:13:47,020 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:13:47,020 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:13:47,020 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:13:47,020 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:13:47,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:13:47,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:13:47,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:13:47,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:13:47,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:13:47,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:13:47,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:13:47,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:13:47,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:13:47,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:13:47,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:13:47,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:47,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:13:47,025 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:13:47,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:13:47,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:13:47,026 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:13:47,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:13:47,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:13:47,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:13:47,027 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_ac1d9788-e6c0-4057-940a-38409e88f892/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2022-11-19 07:13:47,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:13:47,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:13:47,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:13:47,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:13:47,433 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:13:47,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-19 07:13:47,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/0872ec05f/9f628c734ad84c098075d18271cc9f50/FLAGcf0cce601 [2022-11-19 07:13:48,588 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:13:48,588 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-19 07:13:48,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/0872ec05f/9f628c734ad84c098075d18271cc9f50/FLAGcf0cce601 [2022-11-19 07:13:48,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/0872ec05f/9f628c734ad84c098075d18271cc9f50 [2022-11-19 07:13:48,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:13:48,673 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:13:48,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:48,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:13:48,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:13:48,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:13:48" (1/1) ... [2022-11-19 07:13:48,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42adcd18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:48, skipping insertion in model container [2022-11-19 07:13:48,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:13:48" (1/1) ... [2022-11-19 07:13:48,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:13:48,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:13:49,905 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_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-19 07:13:50,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:50,438 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:13:50,604 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_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-19 07:13:50,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:13:50,968 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:13:50,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50 WrapperNode [2022-11-19 07:13:50,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:13:50,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:50,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:13:50,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:13:50,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,218 INFO L138 Inliner]: procedures = 160, calls = 847, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 2353 [2022-11-19 07:13:51,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:13:51,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:13:51,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:13:51,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:13:51,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,369 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:13:51,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:13:51,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:13:51,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:13:51,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (1/1) ... [2022-11-19 07:13:51,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:13:51,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:13:51,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:13:51,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:13:51,522 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 07:13:51,522 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 07:13:51,522 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-19 07:13:51,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-19 07:13:51,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_17 [2022-11-19 07:13:51,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_17 [2022-11-19 07:13:51,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-19 07:13:51,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-19 07:13:51,523 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-19 07:13:51,524 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-19 07:13:51,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:13:51,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:13:51,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:13:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 07:13:51,525 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 07:13:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure can_free_echo_skb [2022-11-19 07:13:51,525 INFO L138 BoogieDeclarations]: Found implementation of procedure can_free_echo_skb [2022-11-19 07:13:51,525 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-19 07:13:51,526 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-19 07:13:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-19 07:13:51,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-19 07:13:51,526 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 07:13:51,526 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 07:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 07:13:51,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 07:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:13:51,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:13:51,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-19 07:13:51,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-19 07:13:51,528 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-19 07:13:51,528 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-19 07:13:51,528 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:13:51,528 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:13:51,529 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-19 07:13:51,529 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-19 07:13:51,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:13:51,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:13:51,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:13:51,530 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-19 07:13:51,530 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-19 07:13:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:13:51,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:13:51,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:13:51,531 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:13:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 07:13:51,532 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 07:13:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:13:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-19 07:13:51,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-19 07:13:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2022-11-19 07:13:51,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2022-11-19 07:13:51,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:13:51,536 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 07:13:51,537 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 07:13:51,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 07:13:51,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 07:13:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:13:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:13:51,538 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:13:51,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:13:51,540 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-19 07:13:51,540 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-19 07:13:51,540 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-19 07:13:51,540 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-19 07:13:51,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:13:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-19 07:13:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-19 07:13:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-19 07:13:51,541 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-19 07:13:51,541 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-19 07:13:51,543 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-19 07:13:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:13:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:13:51,543 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 07:13:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 07:13:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2022-11-19 07:13:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2022-11-19 07:13:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_send_msg [2022-11-19 07:13:51,544 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_send_msg [2022-11-19 07:13:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-19 07:13:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-19 07:13:51,546 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:13:51,546 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:13:51,546 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 07:13:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 07:13:51,547 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-19 07:13:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-19 07:13:51,548 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 07:13:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 07:13:51,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-19 07:13:51,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-19 07:13:51,550 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-19 07:13:51,550 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-19 07:13:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:13:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-19 07:13:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-19 07:13:51,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 07:13:51,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 07:13:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-19 07:13:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-19 07:13:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_disconnect [2022-11-19 07:13:51,552 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_disconnect [2022-11-19 07:13:51,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:13:51,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:13:52,242 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:13:52,245 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:13:52,416 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:13:53,323 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-19 07:13:54,532 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:13:55,164 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:13:55,164 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:13:55,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:55 BoogieIcfgContainer [2022-11-19 07:13:55,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:13:55,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:13:55,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:13:55,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:13:55,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:13:48" (1/3) ... [2022-11-19 07:13:55,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3289cda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:55, skipping insertion in model container [2022-11-19 07:13:55,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:13:50" (2/3) ... [2022-11-19 07:13:55,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3289cda1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:13:55, skipping insertion in model container [2022-11-19 07:13:55,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:13:55" (3/3) ... [2022-11-19 07:13:55,190 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-19 07:13:55,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:13:55,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:13:55,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:13:55,322 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;@538f1e83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:13:55,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:13:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-19 07:13:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 07:13:55,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:13:55,345 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:55,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:13:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:13:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 586262078, now seen corresponding path program 1 times [2022-11-19 07:13:55,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:13:55,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033013767] [2022-11-19 07:13:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:13:55,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:13:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:13:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:13:56,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:13:56,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033013767] [2022-11-19 07:13:56,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033013767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:13:56,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:13:56,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:13:56,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159237502] [2022-11-19 07:13:56,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:13:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:13:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:13:56,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:13:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:13:56,207 INFO L87 Difference]: Start difference. First operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-19 07:13:59,069 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 07:14:01,267 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 07:14:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:01,278 INFO L93 Difference]: Finished difference Result 1475 states and 2086 transitions. [2022-11-19 07:14:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 78 [2022-11-19 07:14:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:01,305 INFO L225 Difference]: With dead ends: 1475 [2022-11-19 07:14:01,305 INFO L226 Difference]: Without dead ends: 958 [2022-11-19 07:14:01,312 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 07:14:01,316 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 649 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:01,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1345 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-19 07:14:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-19 07:14:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2022-11-19 07:14:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 623 states have (on average 1.3595505617977528) internal successors, (847), 654 states have internal predecessors, (847), 246 states have call successors, (246), 87 states have call predecessors, (246), 86 states have return successors, (242), 238 states have call predecessors, (242), 241 states have call successors, (242) [2022-11-19 07:14:01,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1335 transitions. [2022-11-19 07:14:01,532 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1335 transitions. Word has length 78 [2022-11-19 07:14:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:01,533 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1335 transitions. [2022-11-19 07:14:01,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-19 07:14:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1335 transitions. [2022-11-19 07:14:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:14:01,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:01,544 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:01,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:14:01,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash -623802054, now seen corresponding path program 1 times [2022-11-19 07:14:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:01,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427209274] [2022-11-19 07:14:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:01,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:14:02,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:02,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427209274] [2022-11-19 07:14:02,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427209274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:02,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:02,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797064015] [2022-11-19 07:14:02,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:02,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:02,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:02,389 INFO L87 Difference]: Start difference. First operand 956 states and 1335 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:05,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:07,350 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 07:14:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:07,359 INFO L93 Difference]: Finished difference Result 1512 states and 2106 transitions. [2022-11-19 07:14:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:07,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 87 [2022-11-19 07:14:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:07,370 INFO L225 Difference]: With dead ends: 1512 [2022-11-19 07:14:07,376 INFO L226 Difference]: Without dead ends: 1509 [2022-11-19 07:14:07,378 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 07:14:07,380 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 392 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:07,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1227 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 07:14:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-11-19 07:14:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1495. [2022-11-19 07:14:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 980 states have (on average 1.3653061224489795) internal successors, (1338), 1025 states have internal predecessors, (1338), 376 states have call successors, (376), 141 states have call predecessors, (376), 138 states have return successors, (372), 360 states have call predecessors, (372), 371 states have call successors, (372) [2022-11-19 07:14:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2086 transitions. [2022-11-19 07:14:07,484 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2086 transitions. Word has length 87 [2022-11-19 07:14:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:07,485 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 2086 transitions. [2022-11-19 07:14:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2086 transitions. [2022-11-19 07:14:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:14:07,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:07,489 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:14:07,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2136663461, now seen corresponding path program 1 times [2022-11-19 07:14:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:07,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637611605] [2022-11-19 07:14:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:14:08,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:08,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637611605] [2022-11-19 07:14:08,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637611605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:08,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:08,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:08,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273219616] [2022-11-19 07:14:08,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:08,015 INFO L87 Difference]: Start difference. First operand 1495 states and 2086 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:10,400 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 07:14:12,654 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 07:14:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:12,935 INFO L93 Difference]: Finished difference Result 2425 states and 3381 transitions. [2022-11-19 07:14:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:12,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 88 [2022-11-19 07:14:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:12,951 INFO L225 Difference]: With dead ends: 2425 [2022-11-19 07:14:12,952 INFO L226 Difference]: Without dead ends: 2422 [2022-11-19 07:14:12,953 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 07:14:12,954 INFO L413 NwaCegarLoop]: 725 mSDtfsCounter, 654 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:12,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1289 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 07:14:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-11-19 07:14:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2411. [2022-11-19 07:14:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1582 states have (on average 1.3647281921618204) internal successors, (2159), 1655 states have internal predecessors, (2159), 604 states have call successors, (604), 227 states have call predecessors, (604), 224 states have return successors, (602), 584 states have call predecessors, (602), 599 states have call successors, (602) [2022-11-19 07:14:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3365 transitions. [2022-11-19 07:14:13,107 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3365 transitions. Word has length 88 [2022-11-19 07:14:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:13,107 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3365 transitions. [2022-11-19 07:14:13,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3365 transitions. [2022-11-19 07:14:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 07:14:13,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:13,111 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:13,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:14:13,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1811753373, now seen corresponding path program 1 times [2022-11-19 07:14:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129339729] [2022-11-19 07:14:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:13,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:14:13,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:13,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129339729] [2022-11-19 07:14:13,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129339729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:13,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:13,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:13,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694600457] [2022-11-19 07:14:13,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:13,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:13,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:13,318 INFO L87 Difference]: Start difference. First operand 2411 states and 3365 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:15,773 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 07:14:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:16,361 INFO L93 Difference]: Finished difference Result 2584 states and 3582 transitions. [2022-11-19 07:14:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 89 [2022-11-19 07:14:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:16,381 INFO L225 Difference]: With dead ends: 2584 [2022-11-19 07:14:16,382 INFO L226 Difference]: Without dead ends: 2581 [2022-11-19 07:14:16,384 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 07:14:16,385 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 659 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:16,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 815 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:14:16,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2022-11-19 07:14:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2581. [2022-11-19 07:14:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 1691 states have (on average 1.3619160260201064) internal successors, (2303), 1769 states have internal predecessors, (2303), 638 states have call successors, (638), 254 states have call predecessors, (638), 251 states have return successors, (638), 618 states have call predecessors, (638), 634 states have call successors, (638) [2022-11-19 07:14:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3579 transitions. [2022-11-19 07:14:16,551 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3579 transitions. Word has length 89 [2022-11-19 07:14:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:16,551 INFO L495 AbstractCegarLoop]: Abstraction has 2581 states and 3579 transitions. [2022-11-19 07:14:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3579 transitions. [2022-11-19 07:14:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 07:14:16,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:16,554 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:16,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:14:16,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:16,555 INFO L85 PathProgramCache]: Analyzing trace with hash 329480104, now seen corresponding path program 1 times [2022-11-19 07:14:16,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:16,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844414451] [2022-11-19 07:14:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:16,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:14:16,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:16,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844414451] [2022-11-19 07:14:16,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844414451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:16,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:16,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921697389] [2022-11-19 07:14:16,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:16,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:16,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:16,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:16,720 INFO L87 Difference]: Start difference. First operand 2581 states and 3579 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:19,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:20,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:20,687 INFO L93 Difference]: Finished difference Result 2583 states and 3580 transitions. [2022-11-19 07:14:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 90 [2022-11-19 07:14:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:20,718 INFO L225 Difference]: With dead ends: 2583 [2022-11-19 07:14:20,718 INFO L226 Difference]: Without dead ends: 2580 [2022-11-19 07:14:20,723 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 07:14:20,725 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 656 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:20,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 813 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 07:14:20,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2022-11-19 07:14:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2580. [2022-11-19 07:14:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 1691 states have (on average 1.3613246599645181) internal successors, (2302), 1768 states have internal predecessors, (2302), 637 states have call successors, (637), 254 states have call predecessors, (637), 251 states have return successors, (638), 618 states have call predecessors, (638), 634 states have call successors, (638) [2022-11-19 07:14:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 3577 transitions. [2022-11-19 07:14:20,910 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 3577 transitions. Word has length 90 [2022-11-19 07:14:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:20,911 INFO L495 AbstractCegarLoop]: Abstraction has 2580 states and 3577 transitions. [2022-11-19 07:14:20,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 3577 transitions. [2022-11-19 07:14:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:14:20,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:20,915 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:14:20,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1623653888, now seen corresponding path program 1 times [2022-11-19 07:14:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:20,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920342052] [2022-11-19 07:14:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:14:21,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920342052] [2022-11-19 07:14:21,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920342052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:21,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:21,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:21,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618015008] [2022-11-19 07:14:21,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:21,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:21,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:21,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:21,103 INFO L87 Difference]: Start difference. First operand 2580 states and 3577 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:23,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:25,740 WARN L539 Checker$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 07:14:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:26,029 INFO L93 Difference]: Finished difference Result 2591 states and 3587 transitions. [2022-11-19 07:14:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 91 [2022-11-19 07:14:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:26,044 INFO L225 Difference]: With dead ends: 2591 [2022-11-19 07:14:26,045 INFO L226 Difference]: Without dead ends: 2582 [2022-11-19 07:14:26,047 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 07:14:26,051 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 645 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:26,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1283 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 07:14:26,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-11-19 07:14:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2577. [2022-11-19 07:14:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 1688 states have (on average 1.3595971563981042) internal successors, (2295), 1765 states have internal predecessors, (2295), 637 states have call successors, (637), 254 states have call predecessors, (637), 251 states have return successors, (638), 618 states have call predecessors, (638), 634 states have call successors, (638) [2022-11-19 07:14:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 3570 transitions. [2022-11-19 07:14:26,243 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 3570 transitions. Word has length 91 [2022-11-19 07:14:26,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:26,244 INFO L495 AbstractCegarLoop]: Abstraction has 2577 states and 3570 transitions. [2022-11-19 07:14:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:14:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 3570 transitions. [2022-11-19 07:14:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:14:26,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:26,249 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-19 07:14:26,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:14:26,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:26,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:26,250 INFO L85 PathProgramCache]: Analyzing trace with hash 770523060, now seen corresponding path program 1 times [2022-11-19 07:14:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:26,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757897613] [2022-11-19 07:14:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:14:26,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:26,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757897613] [2022-11-19 07:14:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757897613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:26,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:26,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:26,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488803182] [2022-11-19 07:14:26,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:26,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:26,433 INFO L87 Difference]: Start difference. First operand 2577 states and 3570 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:14:29,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:32,446 WARN L539 Checker$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 07:14:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:32,471 INFO L93 Difference]: Finished difference Result 6121 states and 8450 transitions. [2022-11-19 07:14:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 127 [2022-11-19 07:14:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:32,498 INFO L225 Difference]: With dead ends: 6121 [2022-11-19 07:14:32,498 INFO L226 Difference]: Without dead ends: 3567 [2022-11-19 07:14:32,507 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 07:14:32,508 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 272 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:32,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1193 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-11-19 07:14:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2022-11-19 07:14:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3554. [2022-11-19 07:14:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 2341 states have (on average 1.3596753524134986) internal successors, (3183), 2435 states have internal predecessors, (3183), 855 states have call successors, (855), 360 states have call predecessors, (855), 357 states have return successors, (856), 831 states have call predecessors, (856), 852 states have call successors, (856) [2022-11-19 07:14:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 4894 transitions. [2022-11-19 07:14:32,775 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 4894 transitions. Word has length 127 [2022-11-19 07:14:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:32,776 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 4894 transitions. [2022-11-19 07:14:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:14:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 4894 transitions. [2022-11-19 07:14:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-19 07:14:32,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:32,799 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 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] [2022-11-19 07:14:32,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:14:32,799 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:32,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1778739925, now seen corresponding path program 1 times [2022-11-19 07:14:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959208508] [2022-11-19 07:14:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:32,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-19 07:14:33,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959208508] [2022-11-19 07:14:33,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959208508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:33,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:33,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:14:33,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380062541] [2022-11-19 07:14:33,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:33,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:14:33,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:14:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:14:33,014 INFO L87 Difference]: Start difference. First operand 3554 states and 4894 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:14:35,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:37,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:38,052 INFO L93 Difference]: Finished difference Result 8120 states and 11187 transitions. [2022-11-19 07:14:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:14:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 140 [2022-11-19 07:14:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:38,076 INFO L225 Difference]: With dead ends: 8120 [2022-11-19 07:14:38,076 INFO L226 Difference]: Without dead ends: 4595 [2022-11-19 07:14:38,087 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 07:14:38,087 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 243 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:38,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1371 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-19 07:14:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2022-11-19 07:14:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4580. [2022-11-19 07:14:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 3046 states have (on average 1.3624425476034143) internal successors, (4150), 3158 states have internal predecessors, (4150), 1071 states have call successors, (1071), 465 states have call predecessors, (1071), 462 states have return successors, (1072), 1041 states have call predecessors, (1072), 1068 states have call successors, (1072) [2022-11-19 07:14:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 6293 transitions. [2022-11-19 07:14:38,441 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 6293 transitions. Word has length 140 [2022-11-19 07:14:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:38,442 INFO L495 AbstractCegarLoop]: Abstraction has 4580 states and 6293 transitions. [2022-11-19 07:14:38,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:14:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 6293 transitions. [2022-11-19 07:14:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-19 07:14:38,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:38,451 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:38,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:14:38,451 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:38,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1164154028, now seen corresponding path program 1 times [2022-11-19 07:14:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598905713] [2022-11-19 07:14:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:38,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-19 07:14:38,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:38,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598905713] [2022-11-19 07:14:38,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598905713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:14:38,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:14:38,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:14:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581971431] [2022-11-19 07:14:38,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:38,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:14:38,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:14:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:14:38,828 INFO L87 Difference]: Start difference. First operand 4580 states and 6293 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 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 07:14:41,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:44,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:14:44,439 INFO L93 Difference]: Finished difference Result 10118 states and 14366 transitions. [2022-11-19 07:14:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:14:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 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 151 [2022-11-19 07:14:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:14:44,475 INFO L225 Difference]: With dead ends: 10118 [2022-11-19 07:14:44,475 INFO L226 Difference]: Without dead ends: 6738 [2022-11-19 07:14:44,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:14:44,487 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 382 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:14:44,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 2137 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 352 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-11-19 07:14:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6738 states. [2022-11-19 07:14:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6738 to 4592. [2022-11-19 07:14:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 3058 states have (on average 1.3610202746893394) internal successors, (4162), 3170 states have internal predecessors, (4162), 1071 states have call successors, (1071), 465 states have call predecessors, (1071), 462 states have return successors, (1072), 1041 states have call predecessors, (1072), 1068 states have call successors, (1072) [2022-11-19 07:14:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 6305 transitions. [2022-11-19 07:14:44,889 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 6305 transitions. Word has length 151 [2022-11-19 07:14:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:14:44,890 INFO L495 AbstractCegarLoop]: Abstraction has 4592 states and 6305 transitions. [2022-11-19 07:14:44,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 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 07:14:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 6305 transitions. [2022-11-19 07:14:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-19 07:14:44,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:14:44,897 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:14:44,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:14:44,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:14:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:14:44,898 INFO L85 PathProgramCache]: Analyzing trace with hash 5692096, now seen corresponding path program 1 times [2022-11-19 07:14:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:14:44,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164177271] [2022-11-19 07:14:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:44,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:14:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-19 07:14:45,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:14:45,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164177271] [2022-11-19 07:14:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164177271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:45,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491680256] [2022-11-19 07:14:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:14:45,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:14:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:14:45,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:14:45,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:14:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:14:46,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:14:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:14:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 70 proven. 10 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-19 07:14:46,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:14:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-11-19 07:14:47,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491680256] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:14:47,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:14:47,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-19 07:14:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230804672] [2022-11-19 07:14:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:14:47,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:14:47,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:14:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:14:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:14:47,158 INFO L87 Difference]: Start difference. First operand 4592 states and 6305 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-19 07:14:50,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:52,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:55,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:14:57,149 WARN L539 Checker$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 07:14:59,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:01,260 WARN L539 Checker$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 07:15:03,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:03,322 INFO L93 Difference]: Finished difference Result 11349 states and 15635 transitions. [2022-11-19 07:15:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:15:03,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 160 [2022-11-19 07:15:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:03,356 INFO L225 Difference]: With dead ends: 11349 [2022-11-19 07:15:03,356 INFO L226 Difference]: Without dead ends: 6786 [2022-11-19 07:15:03,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:15:03,373 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 743 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 27 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:03,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 2084 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 709 Invalid, 6 Unknown, 0 Unchecked, 15.4s Time] [2022-11-19 07:15:03,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6786 states. [2022-11-19 07:15:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6786 to 6211. [2022-11-19 07:15:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 4141 states have (on average 1.3612653948321662) internal successors, (5637), 4290 states have internal predecessors, (5637), 1404 states have call successors, (1404), 670 states have call predecessors, (1404), 665 states have return successors, (1409), 1363 states have call predecessors, (1409), 1401 states have call successors, (1409) [2022-11-19 07:15:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 8450 transitions. [2022-11-19 07:15:04,069 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 8450 transitions. Word has length 160 [2022-11-19 07:15:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:04,069 INFO L495 AbstractCegarLoop]: Abstraction has 6211 states and 8450 transitions. [2022-11-19 07:15:04,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-19 07:15:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 8450 transitions. [2022-11-19 07:15:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-19 07:15:04,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:04,078 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:04,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:04,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:15:04,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:04,289 INFO L85 PathProgramCache]: Analyzing trace with hash -414356654, now seen corresponding path program 1 times [2022-11-19 07:15:04,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:04,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86856638] [2022-11-19 07:15:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-11-19 07:15:04,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:04,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86856638] [2022-11-19 07:15:04,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86856638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:15:04,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:15:04,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:15:04,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678613676] [2022-11-19 07:15:04,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:15:04,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:15:04,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:04,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:15:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:15:04,644 INFO L87 Difference]: Start difference. First operand 6211 states and 8450 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-19 07:15:07,377 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 07:15:10,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:10,310 INFO L93 Difference]: Finished difference Result 16074 states and 21880 transitions. [2022-11-19 07:15:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:15:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 188 [2022-11-19 07:15:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:10,377 INFO L225 Difference]: With dead ends: 16074 [2022-11-19 07:15:10,377 INFO L226 Difference]: Without dead ends: 9892 [2022-11-19 07:15:10,400 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 07:15:10,401 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 587 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:10,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1385 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-19 07:15:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9892 states. [2022-11-19 07:15:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9892 to 9867. [2022-11-19 07:15:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 6742 states have (on average 1.3728863838623553) internal successors, (9256), 6971 states have internal predecessors, (9256), 2076 states have call successors, (2076), 1057 states have call predecessors, (2076), 1048 states have return successors, (2089), 2019 states have call predecessors, (2089), 2073 states have call successors, (2089) [2022-11-19 07:15:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 13421 transitions. [2022-11-19 07:15:11,226 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 13421 transitions. Word has length 188 [2022-11-19 07:15:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:11,226 INFO L495 AbstractCegarLoop]: Abstraction has 9867 states and 13421 transitions. [2022-11-19 07:15:11,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-19 07:15:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 13421 transitions. [2022-11-19 07:15:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-19 07:15:11,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:11,239 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 3, 3, 3, 3, 3, 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] [2022-11-19 07:15:11,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:15:11,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash 986581504, now seen corresponding path program 1 times [2022-11-19 07:15:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168596517] [2022-11-19 07:15:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-11-19 07:15:12,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:12,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168596517] [2022-11-19 07:15:12,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168596517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:12,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709738336] [2022-11-19 07:15:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:12,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:12,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:12,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:15:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:15:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-11-19 07:15:13,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:15:13,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709738336] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:13,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:15:13,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2022-11-19 07:15:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512617364] [2022-11-19 07:15:13,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:15:13,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:15:13,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:13,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:15:13,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:15:13,550 INFO L87 Difference]: Start difference. First operand 9867 states and 13421 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-19 07:15:17,058 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 07:15:19,881 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 07:15:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:20,299 INFO L93 Difference]: Finished difference Result 24504 states and 34021 transitions. [2022-11-19 07:15:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:15:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 176 [2022-11-19 07:15:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:20,356 INFO L225 Difference]: With dead ends: 24504 [2022-11-19 07:15:20,356 INFO L226 Difference]: Without dead ends: 14668 [2022-11-19 07:15:20,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:15:20,385 INFO L413 NwaCegarLoop]: 811 mSDtfsCounter, 1038 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 243 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:20,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 1548 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 579 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-19 07:15:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14668 states. [2022-11-19 07:15:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14668 to 11774. [2022-11-19 07:15:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11774 states, 8137 states have (on average 1.3836794887550694) internal successors, (11259), 8393 states have internal predecessors, (11259), 2423 states have call successors, (2423), 1222 states have call predecessors, (2423), 1213 states have return successors, (2436), 2357 states have call predecessors, (2436), 2420 states have call successors, (2436) [2022-11-19 07:15:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11774 states to 11774 states and 16118 transitions. [2022-11-19 07:15:21,359 INFO L78 Accepts]: Start accepts. Automaton has 11774 states and 16118 transitions. Word has length 176 [2022-11-19 07:15:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:21,360 INFO L495 AbstractCegarLoop]: Abstraction has 11774 states and 16118 transitions. [2022-11-19 07:15:21,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-19 07:15:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 11774 states and 16118 transitions. [2022-11-19 07:15:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-19 07:15:21,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:21,372 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:21,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:15:21,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:21,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:21,582 INFO L85 PathProgramCache]: Analyzing trace with hash 571875610, now seen corresponding path program 1 times [2022-11-19 07:15:21,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:21,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887438244] [2022-11-19 07:15:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:21,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:15:21,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887438244] [2022-11-19 07:15:21,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887438244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:15:21,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:15:21,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:15:21,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951838737] [2022-11-19 07:15:21,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:15:21,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:15:21,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:15:21,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:15:21,898 INFO L87 Difference]: Start difference. First operand 11774 states and 16118 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:15:24,611 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 07:15:27,082 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 07:15:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:15:27,251 INFO L93 Difference]: Finished difference Result 23529 states and 32218 transitions. [2022-11-19 07:15:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:15:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 182 [2022-11-19 07:15:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:15:27,303 INFO L225 Difference]: With dead ends: 23529 [2022-11-19 07:15:27,303 INFO L226 Difference]: Without dead ends: 11786 [2022-11-19 07:15:27,332 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 07:15:27,333 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 0 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:15:27,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1185 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 07:15:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11786 states. [2022-11-19 07:15:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11786 to 11786. [2022-11-19 07:15:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11786 states, 8149 states have (on average 1.3831144925757761) internal successors, (11271), 8405 states have internal predecessors, (11271), 2423 states have call successors, (2423), 1222 states have call predecessors, (2423), 1213 states have return successors, (2436), 2357 states have call predecessors, (2436), 2420 states have call successors, (2436) [2022-11-19 07:15:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11786 states to 11786 states and 16130 transitions. [2022-11-19 07:15:28,516 INFO L78 Accepts]: Start accepts. Automaton has 11786 states and 16130 transitions. Word has length 182 [2022-11-19 07:15:28,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:15:28,517 INFO L495 AbstractCegarLoop]: Abstraction has 11786 states and 16130 transitions. [2022-11-19 07:15:28,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:15:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 11786 states and 16130 transitions. [2022-11-19 07:15:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-19 07:15:28,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:28,530 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:15:28,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash 668905470, now seen corresponding path program 1 times [2022-11-19 07:15:28,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:28,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130432480] [2022-11-19 07:15:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:15:28,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130432480] [2022-11-19 07:15:28,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130432480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:15:28,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047285772] [2022-11-19 07:15:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:28,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:15:28,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:28,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:15:28,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:15:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:15:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:15:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:15:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:15:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:15:29,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047285772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:15:29,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9381060] [2022-11-19 07:15:29,900 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-11-19 07:15:29,900 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:15:29,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:15:29,911 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:15:29,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:15:34,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:34,314 INFO L217 Elim1Store]: Index analysis took 151 ms [2022-11-19 07:15:34,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 114 select indices, 114 select index equivalence classes, 1253 disjoint index pairs (out of 6441 index pairs), introduced 114 new quantified variables, introduced 0 case distinctions, treesize of input 1003 treesize of output 343 [2022-11-19 07:15:36,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:15:36,845 INFO L217 Elim1Store]: Index analysis took 119 ms [2022-11-19 07:15:36,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 114 select indices, 114 select index equivalence classes, 1253 disjoint index pairs (out of 6441 index pairs), introduced 114 new quantified variables, introduced 0 case distinctions, treesize of input 1003 treesize of output 343 [2022-11-19 07:16:49,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:16:49,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:49,578 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 07:16:49,584 INFO L158 Benchmark]: Toolchain (without parser) took 180911.05ms. Allocated memory was 121.6MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 73.6MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2022-11-19 07:16:49,584 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 99.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:16:49,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2292.32ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 73.4MB in the beginning and 60.2MB in the end (delta: 13.1MB). Peak memory consumption was 58.4MB. Max. memory is 16.1GB. [2022-11-19 07:16:49,585 INFO L158 Benchmark]: Boogie Procedure Inliner took 248.88ms. Allocated memory is still 153.1MB. Free memory was 60.2MB in the beginning and 87.8MB in the end (delta: -27.6MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2022-11-19 07:16:49,586 INFO L158 Benchmark]: Boogie Preprocessor took 195.81ms. Allocated memory is still 153.1MB. Free memory was 87.8MB in the beginning and 73.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-19 07:16:49,586 INFO L158 Benchmark]: RCFGBuilder took 3752.12ms. Allocated memory was 153.1MB in the beginning and 247.5MB in the end (delta: 94.4MB). Free memory was 73.1MB in the beginning and 86.8MB in the end (delta: -13.8MB). Peak memory consumption was 97.2MB. Max. memory is 16.1GB. [2022-11-19 07:16:49,587 INFO L158 Benchmark]: TraceAbstraction took 174411.98ms. Allocated memory was 247.5MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 85.8MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-19 07:16:49,589 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 99.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2292.32ms. Allocated memory was 121.6MB in the beginning and 153.1MB in the end (delta: 31.5MB). Free memory was 73.4MB in the beginning and 60.2MB in the end (delta: 13.1MB). Peak memory consumption was 58.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 248.88ms. Allocated memory is still 153.1MB. Free memory was 60.2MB in the beginning and 87.8MB in the end (delta: -27.6MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 195.81ms. Allocated memory is still 153.1MB. Free memory was 87.8MB in the beginning and 73.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * RCFGBuilder took 3752.12ms. Allocated memory was 153.1MB in the beginning and 247.5MB in the end (delta: 94.4MB). Free memory was 73.1MB in the beginning and 86.8MB in the end (delta: -13.8MB). Peak memory consumption was 97.2MB. Max. memory is 16.1GB. * TraceAbstraction took 174411.98ms. Allocated memory was 247.5MB in the beginning and 2.0GB in the end (delta: 1.8GB). Free memory was 85.8MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-19 07:16:49,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/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_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- 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 07:16:52,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:16:52,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:16:52,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:16:52,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:16:52,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:16:52,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:16:52,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:16:52,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:16:52,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:16:52,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:16:52,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:16:52,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:16:52,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:16:52,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:16:52,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:16:52,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:16:52,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:16:52,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:16:52,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:16:52,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:16:52,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:16:52,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:16:52,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:16:52,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:16:52,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:16:52,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:16:52,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:16:52,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:16:52,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:16:52,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:16:52,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:16:52,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:16:52,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:16:52,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:16:52,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:16:52,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:16:52,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:16:52,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:16:52,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:16:52,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:16:52,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-19 07:16:52,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:16:52,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:16:52,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:16:52,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:16:52,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:16:52,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:16:52,655 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:16:52,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:16:52,656 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:16:52,656 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:16:52,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:16:52,657 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:16:52,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:16:52,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:16:52,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:16:52,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:16:52,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:16:52,659 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:16:52,659 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:16:52,659 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:16:52,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:16:52,660 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:16:52,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:16:52,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:16:52,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:16:52,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:16:52,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:52,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:16:52,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:16:52,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:16:52,663 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:16:52,663 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:16:52,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:16:52,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:16:52,664 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:16:52,664 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_ac1d9788-e6c0-4057-940a-38409e88f892/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2022-11-19 07:16:53,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:16:53,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:16:53,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:16:53,112 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:16:53,114 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:16:53,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-19 07:16:53,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/a67b1eb79/6996b6635b364a3998f75ddedd189b97/FLAG51297f880 [2022-11-19 07:16:54,394 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:16:54,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-19 07:16:54,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/a67b1eb79/6996b6635b364a3998f75ddedd189b97/FLAG51297f880 [2022-11-19 07:16:54,757 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/data/a67b1eb79/6996b6635b364a3998f75ddedd189b97 [2022-11-19 07:16:54,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:16:54,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:16:54,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:54,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:16:54,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:16:54,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:54" (1/1) ... [2022-11-19 07:16:54,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c26da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:54, skipping insertion in model container [2022-11-19 07:16:54,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:16:54" (1/1) ... [2022-11-19 07:16:54,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:16:54,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:16:56,195 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_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-19 07:16:57,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:57,125 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:16:57,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:16:57,375 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_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-19 07:16:57,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:57,612 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:16:57,868 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_ac1d9788-e6c0-4057-940a-38409e88f892/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-19 07:16:58,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:16:58,285 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:16:58,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58 WrapperNode [2022-11-19 07:16:58,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:16:58,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:58,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:16:58,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:16:58,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,620 INFO L138 Inliner]: procedures = 169, calls = 847, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 2286 [2022-11-19 07:16:58,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:16:58,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:16:58,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:16:58,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:16:58,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:16:58,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:16:58,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:16:58,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:16:58,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (1/1) ... [2022-11-19 07:16:58,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:16:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:58,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:16:58,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:16:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 07:16:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 07:16:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-19 07:16:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-19 07:16:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-19 07:16:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_17 [2022-11-19 07:16:58,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_17 [2022-11-19 07:16:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-19 07:16:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-19 07:16:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-19 07:16:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:16:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-19 07:16:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-19 07:16:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-19 07:16:58,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:16:58,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:16:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-19 07:16:58,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-19 07:16:58,961 INFO L130 BoogieDeclarations]: Found specification of procedure can_free_echo_skb [2022-11-19 07:16:58,961 INFO L138 BoogieDeclarations]: Found implementation of procedure can_free_echo_skb [2022-11-19 07:16:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-19 07:16:58,962 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-19 07:16:58,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-19 07:16:58,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-19 07:16:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 07:16:58,963 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 07:16:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 07:16:58,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 07:16:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:16:58,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:16:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-19 07:16:58,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-19 07:16:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-19 07:16:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-19 07:16:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:16:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:16:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-19 07:16:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-19 07:16:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:16:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:16:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-19 07:16:58,967 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-19 07:16:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:16:58,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:16:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:16:58,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:16:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 07:16:58,968 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 07:16:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:16:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-19 07:16:58,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-19 07:16:58,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2022-11-19 07:16:58,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2022-11-19 07:16:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:16:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 07:16:58,970 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 07:16:58,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 07:16:58,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 07:16:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:16:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:16:58,971 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:16:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 07:16:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-19 07:16:58,972 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-19 07:16:58,972 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-19 07:16:58,973 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-19 07:16:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:16:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-19 07:16:58,973 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-19 07:16:58,973 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-19 07:16:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-19 07:16:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-19 07:16:58,974 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-19 07:16:58,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-19 07:16:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-19 07:16:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-19 07:16:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:16:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:16:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:16:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-19 07:16:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 07:16:58,976 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 07:16:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:16:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2022-11-19 07:16:58,977 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2022-11-19 07:16:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-19 07:16:58,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2022-11-19 07:16:58,978 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_send_msg [2022-11-19 07:16:58,978 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_send_msg [2022-11-19 07:16:58,978 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-19 07:16:58,978 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-19 07:16:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:16:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:16:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 07:16:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 07:16:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-19 07:16:58,980 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-19 07:16:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 07:16:58,980 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 07:16:58,981 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-19 07:16:58,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-19 07:16:58,981 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-19 07:16:58,982 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-19 07:16:58,982 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-19 07:16:58,982 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-19 07:16:58,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 07:16:58,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 07:16:58,983 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-19 07:16:58,983 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-19 07:16:58,983 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_disconnect [2022-11-19 07:16:58,983 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_disconnect [2022-11-19 07:16:58,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:16:58,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:16:59,810 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:16:59,818 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:17:00,157 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:17:09,719 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-19 07:17:24,525 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:17:24,552 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:17:24,554 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:17:24,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:24 BoogieIcfgContainer [2022-11-19 07:17:24,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:17:24,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:17:24,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:17:24,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:17:24,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:16:54" (1/3) ... [2022-11-19 07:17:24,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1faca193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:17:24, skipping insertion in model container [2022-11-19 07:17:24,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:16:58" (2/3) ... [2022-11-19 07:17:24,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1faca193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:17:24, skipping insertion in model container [2022-11-19 07:17:24,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:24" (3/3) ... [2022-11-19 07:17:24,573 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-19 07:17:24,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:17:24,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:17:24,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:17:24,689 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;@67393229, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:17:24,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:17:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 685 states, 497 states have (on average 1.3460764587525151) internal successors, (669), 525 states have internal predecessors, (669), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-19 07:17:24,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 07:17:24,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:24,717 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:17:24,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1756755140, now seen corresponding path program 1 times [2022-11-19 07:17:24,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:24,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348567662] [2022-11-19 07:17:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:24,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:24,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:24,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:24,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:17:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:17:26,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:26,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:26,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348567662] [2022-11-19 07:17:26,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348567662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:26,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:26,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:26,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372763889] [2022-11-19 07:17:26,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:26,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:26,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:26,098 INFO L87 Difference]: Start difference. First operand has 685 states, 497 states have (on average 1.3460764587525151) internal successors, (669), 525 states have internal predecessors, (669), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-19 07:17:26,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:26,587 INFO L93 Difference]: Finished difference Result 1993 states and 2809 transitions. [2022-11-19 07:17:26,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 83 [2022-11-19 07:17:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:26,617 INFO L225 Difference]: With dead ends: 1993 [2022-11-19 07:17:26,618 INFO L226 Difference]: Without dead ends: 1285 [2022-11-19 07:17:26,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 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 07:17:26,635 INFO L413 NwaCegarLoop]: 1058 mSDtfsCounter, 862 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:26,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 1975 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-11-19 07:17:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2022-11-19 07:17:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 950 states have (on average 1.328421052631579) internal successors, (1262), 980 states have internal predecessors, (1262), 248 states have call successors, (248), 87 states have call predecessors, (248), 86 states have return successors, (243), 241 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-19 07:17:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1753 transitions. [2022-11-19 07:17:26,923 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1753 transitions. Word has length 83 [2022-11-19 07:17:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:26,924 INFO L495 AbstractCegarLoop]: Abstraction has 1285 states and 1753 transitions. [2022-11-19 07:17:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-19 07:17:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1753 transitions. [2022-11-19 07:17:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-19 07:17:26,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:26,931 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:17:26,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:27,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:27,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:27,160 INFO L85 PathProgramCache]: Analyzing trace with hash -784445184, now seen corresponding path program 1 times [2022-11-19 07:17:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:27,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972213563] [2022-11-19 07:17:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:27,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:27,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:27,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:17:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:17:28,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:17:29,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:29,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972213563] [2022-11-19 07:17:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972213563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:29,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:17:29,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604186096] [2022-11-19 07:17:29,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:29,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:29,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:29,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:29,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:29,328 INFO L87 Difference]: Start difference. First operand 1285 states and 1753 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:29,700 INFO L93 Difference]: Finished difference Result 3804 states and 5202 transitions. [2022-11-19 07:17:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 93 [2022-11-19 07:17:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:29,718 INFO L225 Difference]: With dead ends: 3804 [2022-11-19 07:17:29,719 INFO L226 Difference]: Without dead ends: 2544 [2022-11-19 07:17:29,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 07:17:29,725 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 854 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:29,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 2179 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-11-19 07:17:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2534. [2022-11-19 07:17:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 1881 states have (on average 1.328548644338118) internal successors, (2499), 1937 states have internal predecessors, (2499), 480 states have call successors, (480), 173 states have call predecessors, (480), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-19 07:17:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 3464 transitions. [2022-11-19 07:17:29,931 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 3464 transitions. Word has length 93 [2022-11-19 07:17:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:29,932 INFO L495 AbstractCegarLoop]: Abstraction has 2534 states and 3464 transitions. [2022-11-19 07:17:29,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 3464 transitions. [2022-11-19 07:17:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 07:17:29,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:29,937 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:17:29,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:30,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:30,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1451693715, now seen corresponding path program 1 times [2022-11-19 07:17:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:30,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016746306] [2022-11-19 07:17:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:30,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:30,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:30,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:30,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:17:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:17:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:17:32,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:32,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016746306] [2022-11-19 07:17:32,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016746306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:32,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:32,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:17:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463689957] [2022-11-19 07:17:32,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:32,308 INFO L87 Difference]: Start difference. First operand 2534 states and 3464 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:32,562 INFO L93 Difference]: Finished difference Result 2536 states and 3465 transitions. [2022-11-19 07:17:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 94 [2022-11-19 07:17:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:32,579 INFO L225 Difference]: With dead ends: 2536 [2022-11-19 07:17:32,580 INFO L226 Difference]: Without dead ends: 2533 [2022-11-19 07:17:32,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 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 07:17:32,583 INFO L413 NwaCegarLoop]: 909 mSDtfsCounter, 852 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:32,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 909 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-11-19 07:17:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2533. [2022-11-19 07:17:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 1881 states have (on average 1.3280170122275385) internal successors, (2498), 1936 states have internal predecessors, (2498), 479 states have call successors, (479), 173 states have call predecessors, (479), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-19 07:17:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3462 transitions. [2022-11-19 07:17:32,855 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3462 transitions. Word has length 94 [2022-11-19 07:17:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:32,856 INFO L495 AbstractCegarLoop]: Abstraction has 2533 states and 3462 transitions. [2022-11-19 07:17:32,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3462 transitions. [2022-11-19 07:17:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-19 07:17:32,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:32,859 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:17:32,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:33,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2052527715, now seen corresponding path program 1 times [2022-11-19 07:17:33,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:33,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432358785] [2022-11-19 07:17:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:33,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:33,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:33,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:17:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:17:34,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:34,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:34,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432358785] [2022-11-19 07:17:34,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432358785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:34,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:34,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:17:34,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406090349] [2022-11-19 07:17:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:34,397 INFO L87 Difference]: Start difference. First operand 2533 states and 3462 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:34,647 INFO L93 Difference]: Finished difference Result 2535 states and 3463 transitions. [2022-11-19 07:17:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 95 [2022-11-19 07:17:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:34,662 INFO L225 Difference]: With dead ends: 2535 [2022-11-19 07:17:34,662 INFO L226 Difference]: Without dead ends: 2532 [2022-11-19 07:17:34,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 07:17:34,666 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 849 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:34,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 907 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-11-19 07:17:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2532. [2022-11-19 07:17:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 1881 states have (on average 1.327485380116959) internal successors, (2497), 1935 states have internal predecessors, (2497), 478 states have call successors, (478), 173 states have call predecessors, (478), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-19 07:17:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 3460 transitions. [2022-11-19 07:17:34,911 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 3460 transitions. Word has length 95 [2022-11-19 07:17:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:34,913 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 3460 transitions. [2022-11-19 07:17:34,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 3460 transitions. [2022-11-19 07:17:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:17:34,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:34,920 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:17:34,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:35,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -796449898, now seen corresponding path program 1 times [2022-11-19 07:17:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:35,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769879389] [2022-11-19 07:17:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:35,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:35,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:35,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:17:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:17:36,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:36,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769879389] [2022-11-19 07:17:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769879389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:36,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:36,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:17:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423996975] [2022-11-19 07:17:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:36,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:36,458 INFO L87 Difference]: Start difference. First operand 2532 states and 3460 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:36,709 INFO L93 Difference]: Finished difference Result 2534 states and 3461 transitions. [2022-11-19 07:17:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:36,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 96 [2022-11-19 07:17:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:36,725 INFO L225 Difference]: With dead ends: 2534 [2022-11-19 07:17:36,725 INFO L226 Difference]: Without dead ends: 2531 [2022-11-19 07:17:36,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 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 07:17:36,729 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 846 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:36,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 905 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2022-11-19 07:17:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2531. [2022-11-19 07:17:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 1881 states have (on average 1.3269537480063796) internal successors, (2496), 1934 states have internal predecessors, (2496), 477 states have call successors, (477), 173 states have call predecessors, (477), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-19 07:17:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3458 transitions. [2022-11-19 07:17:37,036 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3458 transitions. Word has length 96 [2022-11-19 07:17:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:37,036 INFO L495 AbstractCegarLoop]: Abstraction has 2531 states and 3458 transitions. [2022-11-19 07:17:37,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3458 transitions. [2022-11-19 07:17:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 07:17:37,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:37,039 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:17:37,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:37,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1079562182, now seen corresponding path program 1 times [2022-11-19 07:17:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:37,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256647743] [2022-11-19 07:17:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:37,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:37,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:37,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:37,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-19 07:17:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:38,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:17:38,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:38,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:38,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256647743] [2022-11-19 07:17:38,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256647743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:38,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:38,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:17:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668035236] [2022-11-19 07:17:38,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:38,438 INFO L87 Difference]: Start difference. First operand 2531 states and 3458 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:38,736 INFO L93 Difference]: Finished difference Result 2533 states and 3459 transitions. [2022-11-19 07:17:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 97 [2022-11-19 07:17:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:38,752 INFO L225 Difference]: With dead ends: 2533 [2022-11-19 07:17:38,752 INFO L226 Difference]: Without dead ends: 2521 [2022-11-19 07:17:38,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 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 07:17:38,756 INFO L413 NwaCegarLoop]: 904 mSDtfsCounter, 843 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:38,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:38,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2022-11-19 07:17:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2521. [2022-11-19 07:17:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2521 states, 1872 states have (on average 1.3263888888888888) internal successors, (2483), 1924 states have internal predecessors, (2483), 476 states have call successors, (476), 173 states have call predecessors, (476), 172 states have return successors, (485), 471 states have call predecessors, (485), 475 states have call successors, (485) [2022-11-19 07:17:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3444 transitions. [2022-11-19 07:17:39,085 INFO L78 Accepts]: Start accepts. Automaton has 2521 states and 3444 transitions. Word has length 97 [2022-11-19 07:17:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:39,086 INFO L495 AbstractCegarLoop]: Abstraction has 2521 states and 3444 transitions. [2022-11-19 07:17:39,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:17:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2521 states and 3444 transitions. [2022-11-19 07:17:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:17:39,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:39,096 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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] [2022-11-19 07:17:39,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:39,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -418987701, now seen corresponding path program 1 times [2022-11-19 07:17:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:39,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602852746] [2022-11-19 07:17:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:39,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:39,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:39,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:39,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:17:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:40,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:17:40,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:40,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:40,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602852746] [2022-11-19 07:17:40,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602852746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:40,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:40,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358077097] [2022-11-19 07:17:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:40,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:40,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:40,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:40,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:40,370 INFO L87 Difference]: Start difference. First operand 2521 states and 3444 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:17:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:40,978 INFO L93 Difference]: Finished difference Result 5898 states and 7997 transitions. [2022-11-19 07:17:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:40,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 142 [2022-11-19 07:17:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:41,006 INFO L225 Difference]: With dead ends: 5898 [2022-11-19 07:17:41,006 INFO L226 Difference]: Without dead ends: 3402 [2022-11-19 07:17:41,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 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 07:17:41,017 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 327 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:41,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1808 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2022-11-19 07:17:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3394. [2022-11-19 07:17:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 2525 states have (on average 1.3144554455445545) internal successors, (3319), 2585 states have internal predecessors, (3319), 625 states have call successors, (625), 244 states have call predecessors, (625), 243 states have return successors, (634), 620 states have call predecessors, (634), 624 states have call successors, (634) [2022-11-19 07:17:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 4578 transitions. [2022-11-19 07:17:41,595 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 4578 transitions. Word has length 142 [2022-11-19 07:17:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:41,596 INFO L495 AbstractCegarLoop]: Abstraction has 3394 states and 4578 transitions. [2022-11-19 07:17:41,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:17:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 4578 transitions. [2022-11-19 07:17:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:17:41,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:41,604 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 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] [2022-11-19 07:17:41,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:41,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:41,832 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1708712747, now seen corresponding path program 1 times [2022-11-19 07:17:41,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:41,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021515542] [2022-11-19 07:17:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:41,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:41,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:41,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:41,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:17:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:43,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:17:43,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:43,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021515542] [2022-11-19 07:17:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021515542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:43,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:43,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:43,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337339811] [2022-11-19 07:17:43,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:43,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:43,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:43,162 INFO L87 Difference]: Start difference. First operand 3394 states and 4578 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:17:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:43,875 INFO L93 Difference]: Finished difference Result 7678 states and 10337 transitions. [2022-11-19 07:17:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 159 [2022-11-19 07:17:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:43,907 INFO L225 Difference]: With dead ends: 7678 [2022-11-19 07:17:43,907 INFO L226 Difference]: Without dead ends: 4316 [2022-11-19 07:17:43,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 07:17:43,918 INFO L413 NwaCegarLoop]: 1191 mSDtfsCounter, 304 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:43,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2065 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2022-11-19 07:17:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 4308. [2022-11-19 07:17:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4308 states, 3221 states have (on average 1.3092207389009625) internal successors, (4217), 3289 states have internal predecessors, (4217), 773 states have call successors, (773), 314 states have call predecessors, (773), 313 states have return successors, (782), 768 states have call predecessors, (782), 772 states have call successors, (782) [2022-11-19 07:17:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 5772 transitions. [2022-11-19 07:17:44,522 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 5772 transitions. Word has length 159 [2022-11-19 07:17:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:44,523 INFO L495 AbstractCegarLoop]: Abstraction has 4308 states and 5772 transitions. [2022-11-19 07:17:44,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-19 07:17:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 5772 transitions. [2022-11-19 07:17:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:17:44,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:44,533 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:44,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:44,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:44,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:44,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1658519378, now seen corresponding path program 1 times [2022-11-19 07:17:44,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:44,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053383241] [2022-11-19 07:17:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:44,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:44,757 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:44,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:17:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:46,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-19 07:17:46,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:46,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053383241] [2022-11-19 07:17:46,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053383241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:46,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:46,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:46,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413027644] [2022-11-19 07:17:46,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:46,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:46,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:46,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:46,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:46,127 INFO L87 Difference]: Start difference. First operand 4308 states and 5772 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:17:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:47,257 INFO L93 Difference]: Finished difference Result 10362 states and 13819 transitions. [2022-11-19 07:17:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 173 [2022-11-19 07:17:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:47,304 INFO L225 Difference]: With dead ends: 10362 [2022-11-19 07:17:47,304 INFO L226 Difference]: Without dead ends: 6086 [2022-11-19 07:17:47,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 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 07:17:47,320 INFO L413 NwaCegarLoop]: 1459 mSDtfsCounter, 673 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:47,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 2246 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2022-11-19 07:17:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 6078. [2022-11-19 07:17:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6078 states, 4565 states have (on average 1.3093099671412924) internal successors, (5977), 4661 states have internal predecessors, (5977), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 475 states have return successors, (1046), 1028 states have call predecessors, (1046), 1036 states have call successors, (1046) [2022-11-19 07:17:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6078 states to 6078 states and 8060 transitions. [2022-11-19 07:17:48,160 INFO L78 Accepts]: Start accepts. Automaton has 6078 states and 8060 transitions. Word has length 173 [2022-11-19 07:17:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:48,161 INFO L495 AbstractCegarLoop]: Abstraction has 6078 states and 8060 transitions. [2022-11-19 07:17:48,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:17:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6078 states and 8060 transitions. [2022-11-19 07:17:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-19 07:17:48,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:48,173 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 3, 3, 3, 3, 3, 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] [2022-11-19 07:17:48,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:48,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:48,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1212811635, now seen corresponding path program 1 times [2022-11-19 07:17:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:48,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774253574] [2022-11-19 07:17:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:48,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:48,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:48,391 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:48,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 07:17:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:49,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:17:49,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:17:49,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:49,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:49,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774253574] [2022-11-19 07:17:49,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774253574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:49,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:49,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:17:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693321468] [2022-11-19 07:17:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:49,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:49,610 INFO L87 Difference]: Start difference. First operand 6078 states and 8060 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:17:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:51,371 INFO L93 Difference]: Finished difference Result 16164 states and 21601 transitions. [2022-11-19 07:17:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:17:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 192 [2022-11-19 07:17:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:51,430 INFO L225 Difference]: With dead ends: 16164 [2022-11-19 07:17:51,430 INFO L226 Difference]: Without dead ends: 10118 [2022-11-19 07:17:51,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 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 07:17:51,451 INFO L413 NwaCegarLoop]: 1599 mSDtfsCounter, 1053 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 4080 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:51,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 4080 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:17:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10118 states. [2022-11-19 07:17:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10118 to 6086. [2022-11-19 07:17:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 4573 states have (on average 1.308768860704133) internal successors, (5985), 4669 states have internal predecessors, (5985), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 475 states have return successors, (1046), 1028 states have call predecessors, (1046), 1036 states have call successors, (1046) [2022-11-19 07:17:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 8068 transitions. [2022-11-19 07:17:52,515 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 8068 transitions. Word has length 192 [2022-11-19 07:17:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:52,515 INFO L495 AbstractCegarLoop]: Abstraction has 6086 states and 8068 transitions. [2022-11-19 07:17:52,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:17:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 8068 transitions. [2022-11-19 07:17:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-19 07:17:52,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:52,528 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:52,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:52,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:52,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1575801982, now seen corresponding path program 1 times [2022-11-19 07:17:52,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:52,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538768172] [2022-11-19 07:17:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:52,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:52,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:52,746 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:17:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:17:54,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:17:54,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:54,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:54,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538768172] [2022-11-19 07:17:54,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538768172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:54,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:54,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:17:54,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265616606] [2022-11-19 07:17:54,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:54,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:17:54,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:17:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:17:54,318 INFO L87 Difference]: Start difference. First operand 6086 states and 8068 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:17:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:55,909 INFO L93 Difference]: Finished difference Result 14762 states and 20199 transitions. [2022-11-19 07:17:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:17:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) Word has length 214 [2022-11-19 07:17:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:55,955 INFO L225 Difference]: With dead ends: 14762 [2022-11-19 07:17:55,956 INFO L226 Difference]: Without dead ends: 8708 [2022-11-19 07:17:55,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:17:55,979 INFO L413 NwaCegarLoop]: 1301 mSDtfsCounter, 281 mSDsluCounter, 7428 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 8729 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:55,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 8729 Invalid, 63 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:17:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8708 states. [2022-11-19 07:17:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8708 to 6118. [2022-11-19 07:17:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6118 states, 4597 states have (on average 1.3071568414183163) internal successors, (6009), 4693 states have internal predecessors, (6009), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 483 states have return successors, (1086), 1036 states have call predecessors, (1086), 1036 states have call successors, (1086) [2022-11-19 07:17:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6118 states to 6118 states and 8132 transitions. [2022-11-19 07:17:57,113 INFO L78 Accepts]: Start accepts. Automaton has 6118 states and 8132 transitions. Word has length 214 [2022-11-19 07:17:57,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:57,114 INFO L495 AbstractCegarLoop]: Abstraction has 6118 states and 8132 transitions. [2022-11-19 07:17:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 4 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:17:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6118 states and 8132 transitions. [2022-11-19 07:17:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-19 07:17:57,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:57,126 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:57,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:57,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:57,353 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1683768680, now seen corresponding path program 1 times [2022-11-19 07:17:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:17:57,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681257654] [2022-11-19 07:17:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:57,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:17:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:17:57,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:17:57,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:17:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:17:58,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:58,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:17:58,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681257654] [2022-11-19 07:17:58,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681257654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:58,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:58,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:58,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711043072] [2022-11-19 07:17:58,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:58,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:58,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:17:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:58,964 INFO L87 Difference]: Start difference. First operand 6118 states and 8132 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 07:17:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:59,741 INFO L93 Difference]: Finished difference Result 12212 states and 16232 transitions. [2022-11-19 07:17:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:59,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 220 [2022-11-19 07:17:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:59,771 INFO L225 Difference]: With dead ends: 12212 [2022-11-19 07:17:59,771 INFO L226 Difference]: Without dead ends: 6126 [2022-11-19 07:17:59,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 218 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 07:17:59,793 INFO L413 NwaCegarLoop]: 898 mSDtfsCounter, 1 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:59,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1793 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-11-19 07:18:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 6122. [2022-11-19 07:18:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 4601 states have (on average 1.3068898065637904) internal successors, (6013), 4697 states have internal predecessors, (6013), 1037 states have call successors, (1037), 476 states have call predecessors, (1037), 483 states have return successors, (1086), 1036 states have call predecessors, (1086), 1036 states have call successors, (1086) [2022-11-19 07:18:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 8136 transitions. [2022-11-19 07:18:00,706 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 8136 transitions. Word has length 220 [2022-11-19 07:18:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:00,707 INFO L495 AbstractCegarLoop]: Abstraction has 6122 states and 8136 transitions. [2022-11-19 07:18:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 07:18:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 8136 transitions. [2022-11-19 07:18:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-19 07:18:00,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:00,719 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:00,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:00,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1349462172, now seen corresponding path program 1 times [2022-11-19 07:18:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:18:00,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076759962] [2022-11-19 07:18:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:00,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:18:00,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:18:00,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 07:18:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:18:02,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:18:02,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:18:02,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:18:02,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076759962] [2022-11-19 07:18:02,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076759962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71949175] [2022-11-19 07:18:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:02,801 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:18:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:18:02,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:18:02,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-19 07:18:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:18:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-11-19 07:18:04,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:18:04,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71949175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:04,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:18:04,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4] total 13 [2022-11-19 07:18:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162829411] [2022-11-19 07:18:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:04,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:18:04,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:18:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:18:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:18:04,442 INFO L87 Difference]: Start difference. First operand 6122 states and 8136 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-19 07:18:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:13,057 INFO L93 Difference]: Finished difference Result 26296 states and 37127 transitions. [2022-11-19 07:18:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:18:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 222 [2022-11-19 07:18:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:13,163 INFO L225 Difference]: With dead ends: 26296 [2022-11-19 07:18:13,163 INFO L226 Difference]: Without dead ends: 20206 [2022-11-19 07:18:13,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:18:13,190 INFO L413 NwaCegarLoop]: 2234 mSDtfsCounter, 3374 mSDsluCounter, 14167 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 825 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 16401 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 825 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:13,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 16401 Invalid, 1412 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [825 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-19 07:18:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20206 states. [2022-11-19 07:18:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20206 to 6182. [2022-11-19 07:18:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6182 states, 4649 states have (on average 1.304581630458163) internal successors, (6065), 4745 states have internal predecessors, (6065), 1049 states have call successors, (1049), 476 states have call predecessors, (1049), 483 states have return successors, (1100), 1048 states have call predecessors, (1100), 1048 states have call successors, (1100) [2022-11-19 07:18:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6182 states to 6182 states and 8214 transitions. [2022-11-19 07:18:14,614 INFO L78 Accepts]: Start accepts. Automaton has 6182 states and 8214 transitions. Word has length 222 [2022-11-19 07:18:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:14,615 INFO L495 AbstractCegarLoop]: Abstraction has 6182 states and 8214 transitions. [2022-11-19 07:18:14,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 4 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-19 07:18:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 6182 states and 8214 transitions. [2022-11-19 07:18:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-19 07:18:14,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:14,627 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:14,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:14,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:15,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:15,049 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1665641446, now seen corresponding path program 1 times [2022-11-19 07:18:15,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:18:15,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542474192] [2022-11-19 07:18:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:15,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:15,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:18:15,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:18:15,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-19 07:18:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:18:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:18:16,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:18:16,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:18:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542474192] [2022-11-19 07:18:16,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542474192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [275419477] [2022-11-19 07:18:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:16,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:18:16,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:18:16,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:18:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-19 07:18:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:17,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:18:17,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-11-19 07:18:18,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:18:18,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [275419477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:18,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:18:18,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2022-11-19 07:18:18,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285797334] [2022-11-19 07:18:18,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:18,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:18:18,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:18:18,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:18:18,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:18:18,078 INFO L87 Difference]: Start difference. First operand 6182 states and 8214 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-19 07:18:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:19,564 INFO L93 Difference]: Finished difference Result 12420 states and 16544 transitions. [2022-11-19 07:18:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:18:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 222 [2022-11-19 07:18:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:19,599 INFO L225 Difference]: With dead ends: 12420 [2022-11-19 07:18:19,599 INFO L226 Difference]: Without dead ends: 6270 [2022-11-19 07:18:19,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:18:19,619 INFO L413 NwaCegarLoop]: 899 mSDtfsCounter, 4 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:19,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3584 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:18:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6270 states. [2022-11-19 07:18:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6270 to 6242. [2022-11-19 07:18:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 4693 states have (on average 1.30343064138078) internal successors, (6117), 4789 states have internal predecessors, (6117), 1057 states have call successors, (1057), 476 states have call predecessors, (1057), 491 states have return successors, (1140), 1064 states have call predecessors, (1140), 1056 states have call successors, (1140) [2022-11-19 07:18:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 8314 transitions. [2022-11-19 07:18:21,193 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 8314 transitions. Word has length 222 [2022-11-19 07:18:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:21,194 INFO L495 AbstractCegarLoop]: Abstraction has 6242 states and 8314 transitions. [2022-11-19 07:18:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2022-11-19 07:18:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 8314 transitions. [2022-11-19 07:18:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-19 07:18:21,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:21,206 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:21,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:21,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:21,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:21,616 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -71569024, now seen corresponding path program 1 times [2022-11-19 07:18:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:18:21,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780795710] [2022-11-19 07:18:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:21,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:18:21,621 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:18:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 07:18:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:18:22,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:18:22,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-19 07:18:23,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:18:23,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780795710] [2022-11-19 07:18:23,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780795710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:23,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [141235445] [2022-11-19 07:18:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:23,184 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:18:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:18:23,185 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:18:23,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 07:18:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:24,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:18:24,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-11-19 07:18:24,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:18:24,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [141235445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:24,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:18:24,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 11 [2022-11-19 07:18:24,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96828386] [2022-11-19 07:18:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:24,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:18:24,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:18:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:18:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:18:24,860 INFO L87 Difference]: Start difference. First operand 6242 states and 8314 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 07:18:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:35,706 INFO L93 Difference]: Finished difference Result 20328 states and 28659 transitions. [2022-11-19 07:18:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:18:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 228 [2022-11-19 07:18:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:35,779 INFO L225 Difference]: With dead ends: 20328 [2022-11-19 07:18:35,780 INFO L226 Difference]: Without dead ends: 14118 [2022-11-19 07:18:35,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:18:35,798 INFO L413 NwaCegarLoop]: 1855 mSDtfsCounter, 3030 mSDsluCounter, 9402 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3160 SdHoareTripleChecker+Valid, 11257 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:35,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3160 Valid, 11257 Invalid, 1236 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [444 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:18:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14118 states. [2022-11-19 07:18:37,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14118 to 6242. [2022-11-19 07:18:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 4693 states have (on average 1.303004474749627) internal successors, (6115), 4789 states have internal predecessors, (6115), 1057 states have call successors, (1057), 476 states have call predecessors, (1057), 491 states have return successors, (1140), 1064 states have call predecessors, (1140), 1056 states have call successors, (1140) [2022-11-19 07:18:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 8312 transitions. [2022-11-19 07:18:37,577 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 8312 transitions. Word has length 228 [2022-11-19 07:18:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:37,578 INFO L495 AbstractCegarLoop]: Abstraction has 6242 states and 8312 transitions. [2022-11-19 07:18:37,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 6 states have internal predecessors, (121), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-19 07:18:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 8312 transitions. [2022-11-19 07:18:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-19 07:18:37,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:37,590 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:37,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:37,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:18:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:38,002 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:38,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 886581360, now seen corresponding path program 1 times [2022-11-19 07:18:38,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:18:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431424959] [2022-11-19 07:18:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:38,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:18:38,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:18:38,006 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:18:38,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 07:18:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:18:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:18:39,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-19 07:18:39,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:18:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431424959] [2022-11-19 07:18:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431424959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295109698] [2022-11-19 07:18:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:39,807 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:18:39,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:18:39,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:18:39,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 07:18:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:18:41,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 88 proven. 23 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-11-19 07:18:41,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-19 07:18:42,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295109698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:42,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724839152] [2022-11-19 07:18:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:42,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:42,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:42,296 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:42,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:18:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:18:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 88 proven. 23 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-11-19 07:18:44,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-11-19 07:18:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724839152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:44,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:18:44,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 07:18:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862961019] [2022-11-19 07:18:44,612 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:18:44,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:18:44,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:18:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:18:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:18:44,615 INFO L87 Difference]: Start difference. First operand 6242 states and 8312 transitions. Second operand has 10 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 6 states have call successors, (68), 4 states have call predecessors, (68), 4 states have return successors, (67), 6 states have call predecessors, (67), 6 states have call successors, (67) [2022-11-19 07:19:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:02,030 INFO L93 Difference]: Finished difference Result 43631 states and 58121 transitions. [2022-11-19 07:19:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 07:19:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 6 states have call successors, (68), 4 states have call predecessors, (68), 4 states have return successors, (67), 6 states have call predecessors, (67), 6 states have call successors, (67) Word has length 248 [2022-11-19 07:19:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:02,192 INFO L225 Difference]: With dead ends: 43631 [2022-11-19 07:19:02,193 INFO L226 Difference]: Without dead ends: 37421 [2022-11-19 07:19:02,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1505 GetRequests, 1475 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:19:02,217 INFO L413 NwaCegarLoop]: 2213 mSDtfsCounter, 5621 mSDsluCounter, 7951 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5621 SdHoareTripleChecker+Valid, 10164 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:02,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5621 Valid, 10164 Invalid, 2545 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [958 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-19 07:19:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37421 states. [2022-11-19 07:19:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37421 to 37348. [2022-11-19 07:19:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37348 states, 28129 states have (on average 1.3027125031106688) internal successors, (36644), 28737 states have internal predecessors, (36644), 6277 states have call successors, (6277), 2846 states have call predecessors, (6277), 2941 states have return successors, (6780), 6292 states have call predecessors, (6780), 6276 states have call successors, (6780) [2022-11-19 07:19:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37348 states to 37348 states and 49701 transitions. [2022-11-19 07:19:11,779 INFO L78 Accepts]: Start accepts. Automaton has 37348 states and 49701 transitions. Word has length 248 [2022-11-19 07:19:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:11,780 INFO L495 AbstractCegarLoop]: Abstraction has 37348 states and 49701 transitions. [2022-11-19 07:19:11,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.6) internal successors, (366), 10 states have internal predecessors, (366), 6 states have call successors, (68), 4 states have call predecessors, (68), 4 states have return successors, (67), 6 states have call predecessors, (67), 6 states have call successors, (67) [2022-11-19 07:19:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 37348 states and 49701 transitions. [2022-11-19 07:19:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-19 07:19:11,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:11,832 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:11,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-19 07:19:12,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:12,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:12,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:12,447 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash 482733864, now seen corresponding path program 1 times [2022-11-19 07:19:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:12,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351291655] [2022-11-19 07:19:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:12,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:12,452 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:12,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 07:19:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:19:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 90 proven. 16 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-19 07:19:14,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2022-11-19 07:19:14,521 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:14,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351291655] [2022-11-19 07:19:14,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351291655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:14,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1558160853] [2022-11-19 07:19:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:14,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:14,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:14,523 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:14,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-19 07:19:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:19:15,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-19 07:19:16,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:16,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1558160853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:16,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:19:16,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 7] total 13 [2022-11-19 07:19:16,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849173531] [2022-11-19 07:19:16,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:16,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:16,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:16,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:19:16,617 INFO L87 Difference]: Start difference. First operand 37348 states and 49701 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-19 07:19:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:21,186 INFO L93 Difference]: Finished difference Result 56996 states and 75875 transitions. [2022-11-19 07:19:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:21,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 264 [2022-11-19 07:19:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:21,244 INFO L225 Difference]: With dead ends: 56996 [2022-11-19 07:19:21,244 INFO L226 Difference]: Without dead ends: 18428 [2022-11-19 07:19:21,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 778 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:19:21,312 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 716 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:21,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1482 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:19:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18428 states. [2022-11-19 07:19:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18428 to 18428. [2022-11-19 07:19:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 13864 states have (on average 1.2999855741488748) internal successors, (18023), 14168 states have internal predecessors, (18023), 3109 states have call successors, (3109), 1407 states have call predecessors, (3109), 1454 states have return successors, (3360), 3116 states have call predecessors, (3360), 3108 states have call successors, (3360) [2022-11-19 07:19:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 24492 transitions. [2022-11-19 07:19:26,280 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 24492 transitions. Word has length 264 [2022-11-19 07:19:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:26,281 INFO L495 AbstractCegarLoop]: Abstraction has 18428 states and 24492 transitions. [2022-11-19 07:19:26,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-19 07:19:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 24492 transitions. [2022-11-19 07:19:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-19 07:19:26,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:26,300 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:26,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-19 07:19:26,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:26,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:26,701 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 482012256, now seen corresponding path program 1 times [2022-11-19 07:19:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:26,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945026939] [2022-11-19 07:19:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:26,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:26,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:26,704 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:26,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 07:19:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:28,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:19:28,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 52 proven. 16 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-19 07:19:28,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-19 07:19:28,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:28,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945026939] [2022-11-19 07:19:28,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945026939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:28,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1211622627] [2022-11-19 07:19:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:28,786 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:28,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:28,791 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:28,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac1d9788-e6c0-4057-940a-38409e88f892/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 07:19:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:19:30,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-11-19 07:19:32,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:32,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1211622627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:32,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:19:32,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 7] total 21 [2022-11-19 07:19:32,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768558056] [2022-11-19 07:19:32,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:19:32,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:19:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:19:32,433 INFO L87 Difference]: Start difference. First operand 18428 states and 24492 transitions. Second operand has 11 states, 10 states have (on average 14.4) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-19 07:19:49,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:58,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:08,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:10,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:12,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:14,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:16,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:17,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:19,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:21,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:45,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:47,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:49,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:00,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:02,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:10,500 INFO L93 Difference]: Finished difference Result 54506 states and 74555 transitions. [2022-11-19 07:21:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:21:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 14.4) internal successors, (144), 9 states have internal predecessors, (144), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 268 [2022-11-19 07:21:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:10,671 INFO L225 Difference]: With dead ends: 54506 [2022-11-19 07:21:10,671 INFO L226 Difference]: Without dead ends: 35494 [2022-11-19 07:21:10,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 787 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:21:10,723 INFO L413 NwaCegarLoop]: 906 mSDtfsCounter, 3662 mSDsluCounter, 4062 mSDsCounter, 0 mSdLazyCounter, 8755 mSolverCounterSat, 1204 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3788 SdHoareTripleChecker+Valid, 4968 SdHoareTripleChecker+Invalid, 9965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1204 IncrementalHoareTripleChecker+Valid, 8755 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:10,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3788 Valid, 4968 Invalid, 9965 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1204 Valid, 8755 Invalid, 6 Unknown, 0 Unchecked, 86.1s Time] [2022-11-19 07:21:10,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35494 states.