./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF --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 11d3d0800a0e0d53b4d0190c9a443eccbd843952940cf36579a7110b5d32d86b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:59,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:59,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:59,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:59,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:59,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:59,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:59,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:59,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:59,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:59,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:59,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:59,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:59,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:59,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:59,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:59,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:59,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:59,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:59,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:59,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:59,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:59,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:59,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:59,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:59,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:59,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:59,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:59,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:59,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:59,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:59,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:59,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:59,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:59,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:59,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:59,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:59,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:59,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:59,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:59,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:59,927 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:49:59,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:59,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:59,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:59,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:59,977 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:59,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:59,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:59,977 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:49:59,978 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:59,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:59,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:49:59,985 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:49:59,985 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:59,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:49:59,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:49:59,986 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:49:59,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:59,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:59,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:59,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:49:59,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:59,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:49:59,988 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:59,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:49:59,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:59,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:49:59,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:59,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:59,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:59,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:59,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:59,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:49:59,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:49:59,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:49:59,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:49:59,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:59,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:59,992 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11d3d0800a0e0d53b4d0190c9a443eccbd843952940cf36579a7110b5d32d86b [2021-11-12 22:50:00,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:00,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:00,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:00,260 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:00,261 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:00,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 22:50:00,367 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/fe36f4ae8/f89f568838ed4509904aa1e6e2b39e0d/FLAGe068a7160 [2021-11-12 22:50:01,213 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:01,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 22:50:01,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/fe36f4ae8/f89f568838ed4509904aa1e6e2b39e0d/FLAGe068a7160 [2021-11-12 22:50:01,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/fe36f4ae8/f89f568838ed4509904aa1e6e2b39e0d [2021-11-12 22:50:01,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:01,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:01,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:01,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:01,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:01,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:01" (1/1) ... [2021-11-12 22:50:01,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f58546c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:01, skipping insertion in model container [2021-11-12 22:50:01,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:01" (1/1) ... [2021-11-12 22:50:01,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:01,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:04,633 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323389,323402] [2021-11-12 22:50:04,637 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323534,323547] [2021-11-12 22:50:04,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:04,701 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:50:04,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@47b06be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:04, skipping insertion in model container [2021-11-12 22:50:04,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:04,702 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:50:04,704 INFO L158 Benchmark]: Toolchain (without parser) took 3008.68ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 56.0MB in the beginning and 82.2MB in the end (delta: -26.2MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-11-12 22:50:04,705 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 104.9MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:50:04,707 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3006.36ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 55.7MB in the beginning and 82.2MB in the end (delta: -26.5MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-11-12 22:50:04,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 104.9MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3006.36ms. Allocated memory was 104.9MB in the beginning and 138.4MB in the end (delta: 33.6MB). Free memory was 55.7MB in the beginning and 82.2MB in the end (delta: -26.5MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7520]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF --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 11d3d0800a0e0d53b4d0190c9a443eccbd843952940cf36579a7110b5d32d86b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:50:06,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:50:06,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:50:06,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:50:06,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:50:06,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:50:06,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:50:06,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:50:06,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:50:07,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:50:07,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:50:07,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:50:07,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:50:07,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:50:07,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:50:07,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:50:07,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:50:07,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:50:07,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:50:07,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:50:07,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:50:07,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:50:07,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:50:07,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:50:07,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:50:07,046 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:50:07,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:50:07,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:50:07,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:50:07,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:50:07,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:50:07,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:50:07,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:50:07,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:50:07,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:50:07,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:50:07,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:50:07,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:50:07,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:50:07,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:50:07,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:50:07,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:50:07,111 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:50:07,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:50:07,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:50:07,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:50:07,113 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:50:07,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:50:07,113 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:50:07,114 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:50:07,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:50:07,114 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:50:07,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:50:07,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:50:07,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:50:07,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:50:07,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:50:07,118 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:50:07,118 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:50:07,118 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:50:07,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:50:07,119 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:50:07,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:50:07,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:50:07,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:50:07,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:50:07,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:07,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:50:07,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:50:07,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:50:07,121 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:50:07,121 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:07,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:50:07,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:50:07,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:50:07,122 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11d3d0800a0e0d53b4d0190c9a443eccbd843952940cf36579a7110b5d32d86b [2021-11-12 22:50:07,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:50:07,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:50:07,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:50:07,535 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:50:07,536 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:50:07,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 22:50:07,615 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/305802098/2c14cbae135346eca4121176477d8258/FLAG62f8b4c6e [2021-11-12 22:50:08,600 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:50:08,601 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 22:50:08,682 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/305802098/2c14cbae135346eca4121176477d8258/FLAG62f8b4c6e [2021-11-12 22:50:08,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/data/305802098/2c14cbae135346eca4121176477d8258 [2021-11-12 22:50:08,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:50:08,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:50:08,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:08,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:50:08,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:50:08,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:08" (1/1) ... [2021-11-12 22:50:08,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7849d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:08, skipping insertion in model container [2021-11-12 22:50:08,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:50:08" (1/1) ... [2021-11-12 22:50:09,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:50:09,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:11,874 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323389,323402] [2021-11-12 22:50:11,877 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323534,323547] [2021-11-12 22:50:11,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:11,951 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:50:12,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:50:12,437 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323389,323402] [2021-11-12 22:50:12,438 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323534,323547] [2021-11-12 22:50:12,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:12,506 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:50:13,011 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323389,323402] [2021-11-12 22:50:13,012 WARN L228 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_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i[323534,323547] [2021-11-12 22:50:13,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:50:13,209 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:50:13,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13 WrapperNode [2021-11-12 22:50:13,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:50:13,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:13,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:50:13,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:50:13,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:50:13,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:50:13,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:50:13,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:50:13,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:50:13,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:50:13,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:50:13,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:50:13,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (1/1) ... [2021-11-12 22:50:13,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:50:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:13,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:50:13,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:50:13,924 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_irqrestore_97 [2021-11-12 22:50:13,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_irqrestore_97 [2021-11-12 22:50:13,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:50:13,925 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:50:13,925 INFO L130 BoogieDeclarations]: Found specification of procedure RxCurCount [2021-11-12 22:50:13,925 INFO L138 BoogieDeclarations]: Found implementation of procedure RxCurCount [2021-11-12 22:50:13,925 INFO L130 BoogieDeclarations]: Found specification of procedure irda_setup_dma [2021-11-12 22:50:13,925 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_setup_dma [2021-11-12 22:50:13,925 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-12 22:50:13,925 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-12 22:50:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:50:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:50:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-12 22:50:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-12 22:50:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure CheckRegBit [2021-11-12 22:50:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure CheckRegBit [2021-11-12 22:50:13,926 INFO L130 BoogieDeclarations]: Found specification of procedure via_remove_one [2021-11-12 22:50:13,926 INFO L138 BoogieDeclarations]: Found implementation of procedure via_remove_one [2021-11-12 22:50:13,927 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_change_speed [2021-11-12 22:50:13,927 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_change_speed [2021-11-12 22:50:13,927 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 22:50:13,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-12 22:50:13,927 INFO L130 BoogieDeclarations]: Found specification of procedure dma_zalloc_coherent [2021-11-12 22:50:13,927 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_zalloc_coherent [2021-11-12 22:50:13,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-12 22:50:13,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-12 22:50:13,928 INFO L130 BoogieDeclarations]: Found specification of procedure SetPulseWidth [2021-11-12 22:50:13,928 INFO L138 BoogieDeclarations]: Found implementation of procedure SetPulseWidth [2021-11-12 22:50:13,928 INFO L130 BoogieDeclarations]: Found specification of procedure Tdelay [2021-11-12 22:50:13,928 INFO L138 BoogieDeclarations]: Found implementation of procedure Tdelay [2021-11-12 22:50:13,928 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2021-11-12 22:50:13,928 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2021-11-12 22:50:13,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 22:50:13,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 22:50:13,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:50:13,929 INFO L130 BoogieDeclarations]: Found specification of procedure ClkTx [2021-11-12 22:50:13,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ClkTx [2021-11-12 22:50:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure WriteLPCReg [2021-11-12 22:50:13,930 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteLPCReg [2021-11-12 22:50:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:50:13,930 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-12 22:50:13,931 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-12 22:50:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:50:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:50:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure CommonInit [2021-11-12 22:50:13,931 INFO L138 BoogieDeclarations]: Found implementation of procedure CommonInit [2021-11-12 22:50:13,931 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-12 22:50:13,932 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-12 22:50:13,932 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_change_dongle_speed [2021-11-12 22:50:13,933 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_change_dongle_speed [2021-11-12 22:50:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure ReadLPCReg [2021-11-12 22:50:13,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadLPCReg [2021-11-12 22:50:13,934 INFO L130 BoogieDeclarations]: Found specification of procedure free_dma [2021-11-12 22:50:13,934 INFO L138 BoogieDeclarations]: Found implementation of procedure free_dma [2021-11-12 22:50:13,934 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock_lock_of_via_ircc_cb [2021-11-12 22:50:13,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock_lock_of_via_ircc_cb [2021-11-12 22:50:13,935 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_dma_receive [2021-11-12 22:50:13,935 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_dma_receive [2021-11-12 22:50:13,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-12 22:50:13,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-12 22:50:13,936 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_net_close [2021-11-12 22:50:13,936 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_net_close [2021-11-12 22:50:13,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:50:13,936 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:50:13,936 INFO L130 BoogieDeclarations]: Found specification of procedure CkRxRecv [2021-11-12 22:50:13,936 INFO L138 BoogieDeclarations]: Found implementation of procedure CkRxRecv [2021-11-12 22:50:13,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-12 22:50:13,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-12 22:50:13,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-12 22:50:13,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-12 22:50:13,937 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-12 22:50:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-12 22:50:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure irda_get_next_speed [2021-11-12 22:50:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_get_next_speed [2021-11-12 22:50:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure ReadReg [2021-11-12 22:50:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadReg [2021-11-12 22:50:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_open [2021-11-12 22:50:13,938 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_open [2021-11-12 22:50:13,938 INFO L130 BoogieDeclarations]: Found specification of procedure WriteRegBit [2021-11-12 22:50:13,939 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteRegBit [2021-11-12 22:50:13,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:50:13,939 INFO L130 BoogieDeclarations]: Found specification of procedure Wr_Indx [2021-11-12 22:50:13,939 INFO L138 BoogieDeclarations]: Found implementation of procedure Wr_Indx [2021-11-12 22:50:13,940 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 22:50:13,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 22:50:13,940 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-12 22:50:13,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-12 22:50:13,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:50:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:50:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:50:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 22:50:13,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 22:50:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:50:13,941 INFO L130 BoogieDeclarations]: Found specification of procedure WriteReg [2021-11-12 22:50:13,942 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteReg [2021-11-12 22:50:13,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-12 22:50:13,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-12 22:50:13,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-12 22:50:13,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-12 22:50:13,942 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_spin_lock [2021-11-12 22:50:13,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_spin_lock [2021-11-12 22:50:13,942 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 22:50:13,943 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 22:50:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure SetBaudRate [2021-11-12 22:50:13,943 INFO L138 BoogieDeclarations]: Found implementation of procedure SetBaudRate [2021-11-12 22:50:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure Wr_Byte [2021-11-12 22:50:13,943 INFO L138 BoogieDeclarations]: Found implementation of procedure Wr_Byte [2021-11-12 22:50:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-12 22:50:13,944 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-12 22:50:13,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-12 22:50:13,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-12 22:50:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:50:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_net_open [2021-11-12 22:50:13,948 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_net_open [2021-11-12 22:50:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:50:13,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:50:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:50:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure ResetChip [2021-11-12 22:50:13,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ResetChip [2021-11-12 22:50:13,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:50:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:50:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:50:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:50:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:50:13,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:50:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure irda_device_txqueue_empty [2021-11-12 22:50:13,957 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_device_txqueue_empty [2021-11-12 22:50:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2021-11-12 22:50:13,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2021-11-12 22:50:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure Sdelay [2021-11-12 22:50:13,957 INFO L138 BoogieDeclarations]: Found implementation of procedure Sdelay [2021-11-12 22:50:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure SetSIR [2021-11-12 22:50:13,957 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSIR [2021-11-12 22:50:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-12 22:50:13,958 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-12 22:50:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure SetMaxRxPacketSize [2021-11-12 22:50:13,958 INFO L138 BoogieDeclarations]: Found implementation of procedure SetMaxRxPacketSize [2021-11-12 22:50:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure GetRecvByte [2021-11-12 22:50:13,958 INFO L138 BoogieDeclarations]: Found implementation of procedure GetRecvByte [2021-11-12 22:50:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-12 22:50:13,958 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-12 22:50:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:50:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:50:13,958 INFO L130 BoogieDeclarations]: Found specification of procedure hwreset [2021-11-12 22:50:13,959 INFO L138 BoogieDeclarations]: Found implementation of procedure hwreset [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-12 22:50:13,959 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-12 22:50:13,959 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-12 22:50:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-12 22:50:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-12 22:50:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-12 22:50:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-12 22:50:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-12 22:50:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-12 22:50:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-12 22:50:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-12 22:50:13,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-12 22:50:13,960 INFO L130 BoogieDeclarations]: Found specification of procedure via_ircc_dma_xmit [2021-11-12 22:50:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure via_ircc_dma_xmit [2021-11-12 22:50:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-11-12 22:50:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-11-12 22:50:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-12 22:50:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-12 22:50:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-12 22:50:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-12 22:50:13,961 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-12 22:50:13,961 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 22:50:13,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-12 22:50:13,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-12 22:50:13,962 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:50:13,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:50:13,963 INFO L130 BoogieDeclarations]: Found specification of procedure SetSendByte [2021-11-12 22:50:13,963 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSendByte [2021-11-12 22:50:13,963 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-12 22:50:13,963 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-12 22:50:13,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:50:13,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:50:13,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock_lock_of_via_ircc_cb [2021-11-12 22:50:13,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock_lock_of_via_ircc_cb [2021-11-12 22:50:13,963 INFO L130 BoogieDeclarations]: Found specification of procedure SetSendPreambleCount [2021-11-12 22:50:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure SetSendPreambleCount [2021-11-12 22:50:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure InitCard [2021-11-12 22:50:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure InitCard [2021-11-12 22:50:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 22:50:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 22:50:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure SetTimer [2021-11-12 22:50:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure SetTimer [2021-11-12 22:50:13,964 INFO L130 BoogieDeclarations]: Found specification of procedure ActClk [2021-11-12 22:50:13,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ActClk [2021-11-12 22:50:13,965 INFO L130 BoogieDeclarations]: Found specification of procedure request_dma [2021-11-12 22:50:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure request_dma [2021-11-12 22:50:13,965 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-12 22:50:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-12 22:50:13,965 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2021-11-12 22:50:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2021-11-12 22:50:13,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 22:50:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 22:50:13,965 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_to_linear_data [2021-11-12 22:50:13,965 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_to_linear_data [2021-11-12 22:50:15,313 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:51:01,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:51:01,373 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:51:01,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:01 BoogieIcfgContainer [2021-11-12 22:51:01,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:51:01,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:51:01,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:51:01,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:51:01,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:50:08" (1/3) ... [2021-11-12 22:51:01,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@617b8112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:01, skipping insertion in model container [2021-11-12 22:51:01,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:50:13" (2/3) ... [2021-11-12 22:51:01,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@617b8112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:51:01, skipping insertion in model container [2021-11-12 22:51:01,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:51:01" (3/3) ... [2021-11-12 22:51:01,387 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-alloc-spinlock_drivers-net-irda-via-ircc.cil.i [2021-11-12 22:51:01,392 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:51:01,392 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:51:01,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:51:01,455 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:51:01,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:51:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 1819 states, 1086 states have (on average 1.2587476979742174) internal successors, (1367), 1117 states have internal predecessors, (1367), 641 states have call successors, (641), 91 states have call predecessors, (641), 90 states have return successors, (638), 626 states have call predecessors, (638), 638 states have call successors, (638) [2021-11-12 22:51:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2021-11-12 22:51:01,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:01,558 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:01,559 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -542857629, now seen corresponding path program 1 times [2021-11-12 22:51:01,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:01,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208410848] [2021-11-12 22:51:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:01,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:01,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:01,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:51:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 2506 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:51:08,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-12 22:51:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-12 22:51:14,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:14,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208410848] [2021-11-12 22:51:14,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208410848] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:14,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:14,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 20 [2021-11-12 22:51:14,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533266124] [2021-11-12 22:51:14,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:14,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:51:14,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:51:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:51:14,719 INFO L87 Difference]: Start difference. First operand has 1819 states, 1086 states have (on average 1.2587476979742174) internal successors, (1367), 1117 states have internal predecessors, (1367), 641 states have call successors, (641), 91 states have call predecessors, (641), 90 states have return successors, (638), 626 states have call predecessors, (638), 638 states have call successors, (638) Second operand has 13 states, 10 states have (on average 12.3) internal successors, (123), 9 states have internal predecessors, (123), 5 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (35), 6 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 22:51:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:17,143 INFO L93 Difference]: Finished difference Result 3639 states and 5318 transitions. [2021-11-12 22:51:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:51:17,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 12.3) internal successors, (123), 9 states have internal predecessors, (123), 5 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (35), 6 states have call predecessors, (35), 5 states have call successors, (35) Word has length 301 [2021-11-12 22:51:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:17,178 INFO L225 Difference]: With dead ends: 3639 [2021-11-12 22:51:17,179 INFO L226 Difference]: Without dead ends: 1764 [2021-11-12 22:51:17,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:51:17,202 INFO L933 BasicCegarLoop]: 2637 mSDtfsCounter, 136 mSDsluCounter, 18212 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1467.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 20849 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 66.58ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1581.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:17,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 20849 Invalid, 372 Unknown, 0 Unchecked, 66.58ms Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1581.95ms Time] [2021-11-12 22:51:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-11-12 22:51:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1762. [2021-11-12 22:51:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1057 states have (on average 1.2563859981078525) internal successors, (1328), 1085 states have internal predecessors, (1328), 615 states have call successors, (615), 89 states have call predecessors, (615), 89 states have return successors, (615), 603 states have call predecessors, (615), 615 states have call successors, (615) [2021-11-12 22:51:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2558 transitions. [2021-11-12 22:51:17,418 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2558 transitions. Word has length 301 [2021-11-12 22:51:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:17,420 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2558 transitions. [2021-11-12 22:51:17,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 12.3) internal successors, (123), 9 states have internal predecessors, (123), 5 states have call successors, (39), 2 states have call predecessors, (39), 5 states have return successors, (35), 6 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 22:51:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2558 transitions. [2021-11-12 22:51:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-12 22:51:17,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:17,436 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:17,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:17,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:17,646 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1555460678, now seen corresponding path program 1 times [2021-11-12 22:51:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:17,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136605282] [2021-11-12 22:51:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:17,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:17,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:17,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:17,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:51:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:24,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:51:24,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 301 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:51:25,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-12 22:51:27,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:27,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136605282] [2021-11-12 22:51:27,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136605282] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:27,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:27,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2021-11-12 22:51:27,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143805753] [2021-11-12 22:51:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:27,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:51:27,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:51:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:51:27,610 INFO L87 Difference]: Start difference. First operand 1762 states and 2558 transitions. Second operand has 12 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 5 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-12 22:51:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:30,184 INFO L93 Difference]: Finished difference Result 3601 states and 5236 transitions. [2021-11-12 22:51:30,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:51:30,185 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 5 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) Word has length 305 [2021-11-12 22:51:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:30,209 INFO L225 Difference]: With dead ends: 3601 [2021-11-12 22:51:30,209 INFO L226 Difference]: Without dead ends: 1857 [2021-11-12 22:51:30,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:51:30,225 INFO L933 BasicCegarLoop]: 2654 mSDtfsCounter, 202 mSDsluCounter, 26196 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1613.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 28850 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.21ms SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1740.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:30,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 28850 Invalid, 553 Unknown, 0 Unchecked, 48.21ms Time], IncrementalHoareTripleChecker [127 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 1740.86ms Time] [2021-11-12 22:51:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-11-12 22:51:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1770. [2021-11-12 22:51:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1063 states have (on average 1.2549388523047977) internal successors, (1334), 1091 states have internal predecessors, (1334), 617 states have call successors, (617), 89 states have call predecessors, (617), 89 states have return successors, (617), 605 states have call predecessors, (617), 617 states have call successors, (617) [2021-11-12 22:51:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2568 transitions. [2021-11-12 22:51:30,355 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2568 transitions. Word has length 305 [2021-11-12 22:51:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:30,357 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2568 transitions. [2021-11-12 22:51:30,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 5 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (37), 5 states have call predecessors, (37), 5 states have call successors, (37) [2021-11-12 22:51:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2568 transitions. [2021-11-12 22:51:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-12 22:51:30,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:30,366 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:51:30,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:30,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:30,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash 370322952, now seen corresponding path program 1 times [2021-11-12 22:51:30,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:30,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618187058] [2021-11-12 22:51:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:30,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:30,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:30,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:51:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 2657 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:51:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-12 22:51:38,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-11-12 22:51:39,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:39,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618187058] [2021-11-12 22:51:39,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618187058] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:51:39,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:51:39,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:51:39,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884138836] [2021-11-12 22:51:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:39,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:51:39,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:51:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:51:39,756 INFO L87 Difference]: Start difference. First operand 1770 states and 2568 transitions. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 2 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-12 22:51:42,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:42,115 INFO L93 Difference]: Finished difference Result 3528 states and 5124 transitions. [2021-11-12 22:51:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:51:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 2 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) Word has length 280 [2021-11-12 22:51:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:42,165 INFO L225 Difference]: With dead ends: 3528 [2021-11-12 22:51:42,165 INFO L226 Difference]: Without dead ends: 1777 [2021-11-12 22:51:42,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:51:42,186 INFO L933 BasicCegarLoop]: 2555 mSDtfsCounter, 5 mSDsluCounter, 10212 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2124.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12767 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.82ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2132.87ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:42,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12767 Invalid, 22 Unknown, 0 Unchecked, 23.82ms Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 1 Unknown, 0 Unchecked, 2132.87ms Time] [2021-11-12 22:51:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-11-12 22:51:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1775. [2021-11-12 22:51:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1067 states have (on average 1.25398313027179) internal successors, (1338), 1095 states have internal predecessors, (1338), 617 states have call successors, (617), 89 states have call predecessors, (617), 90 states have return successors, (621), 606 states have call predecessors, (621), 617 states have call successors, (621) [2021-11-12 22:51:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2576 transitions. [2021-11-12 22:51:42,325 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2576 transitions. Word has length 280 [2021-11-12 22:51:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:42,327 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 2576 transitions. [2021-11-12 22:51:42,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 5 states have internal predecessors, (119), 2 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (38), 3 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-12 22:51:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2576 transitions. [2021-11-12 22:51:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-12 22:51:42,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:42,338 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 8, 8, 8, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:42,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:42,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -99456402, now seen corresponding path program 1 times [2021-11-12 22:51:42,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:42,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507597697] [2021-11-12 22:51:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:42,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:42,574 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:42,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:51:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:51:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:51:50,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-12 22:51:50,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-12 22:51:51,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507597697] [2021-11-12 22:51:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507597697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:51:51,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:51:51,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:51:51,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685917315] [2021-11-12 22:51:51,709 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:51:51,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:51:51,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:51:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:51:51,711 INFO L87 Difference]: Start difference. First operand 1775 states and 2576 transitions. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 8 states have internal predecessors, (119), 2 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-12 22:51:53,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:55,830 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:56,158 INFO L93 Difference]: Finished difference Result 3546 states and 5150 transitions. [2021-11-12 22:51:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:51:56,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 8 states have internal predecessors, (119), 2 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) Word has length 296 [2021-11-12 22:51:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:56,179 INFO L225 Difference]: With dead ends: 3546 [2021-11-12 22:51:56,180 INFO L226 Difference]: Without dead ends: 1790 [2021-11-12 22:51:56,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:51:56,196 INFO L933 BasicCegarLoop]: 2562 mSDtfsCounter, 16 mSDsluCounter, 15359 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4185.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17921 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.80ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4220.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:56,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 17921 Invalid, 34 Unknown, 0 Unchecked, 27.80ms Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 4220.00ms Time] [2021-11-12 22:51:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-11-12 22:51:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1778. [2021-11-12 22:51:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1070 states have (on average 1.253271028037383) internal successors, (1341), 1097 states have internal predecessors, (1341), 617 states have call successors, (617), 89 states have call predecessors, (617), 90 states have return successors, (621), 607 states have call predecessors, (621), 617 states have call successors, (621) [2021-11-12 22:51:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2579 transitions. [2021-11-12 22:51:56,310 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2579 transitions. Word has length 296 [2021-11-12 22:51:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:56,312 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2579 transitions. [2021-11-12 22:51:56,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 8 states have internal predecessors, (119), 2 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (42), 4 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-12 22:51:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2579 transitions. [2021-11-12 22:51:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-12 22:51:56,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:56,322 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:56,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:51:56,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:51:56,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:51:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1756561224, now seen corresponding path program 1 times [2021-11-12 22:51:56,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:56,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668510887] [2021-11-12 22:51:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:51:56,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:56,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:56,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:56,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:52:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:52:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:06,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:07,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:07,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668510887] [2021-11-12 22:52:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668510887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:07,416 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:07,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-12 22:52:07,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261334053] [2021-11-12 22:52:07,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:07,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:52:07,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:52:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:52:07,418 INFO L87 Difference]: Start difference. First operand 1778 states and 2579 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 3 states have call successors, (83), 3 states have call predecessors, (83), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2021-11-12 22:52:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:07,621 INFO L93 Difference]: Finished difference Result 5041 states and 7311 transitions. [2021-11-12 22:52:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 3 states have call successors, (83), 3 states have call predecessors, (83), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) Word has length 312 [2021-11-12 22:52:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:07,662 INFO L225 Difference]: With dead ends: 5041 [2021-11-12 22:52:07,662 INFO L226 Difference]: Without dead ends: 3282 [2021-11-12 22:52:07,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:52:07,678 INFO L933 BasicCegarLoop]: 3073 mSDtfsCounter, 2010 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2010 SdHoareTripleChecker+Valid, 5597 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.37ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:07,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2010 Valid, 5597 Invalid, 5 Unknown, 0 Unchecked, 19.37ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 37.84ms Time] [2021-11-12 22:52:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-11-12 22:52:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3280. [2021-11-12 22:52:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.257460799190693) internal successors, (2486), 2027 states have internal predecessors, (2486), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:52:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4754 transitions. [2021-11-12 22:52:07,927 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4754 transitions. Word has length 312 [2021-11-12 22:52:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:07,931 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4754 transitions. [2021-11-12 22:52:07,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 3 states have call successors, (83), 3 states have call predecessors, (83), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2021-11-12 22:52:07,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4754 transitions. [2021-11-12 22:52:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-12 22:52:07,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:07,942 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:08,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:08,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:08,167 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:08,168 INFO L85 PathProgramCache]: Analyzing trace with hash 457770256, now seen corresponding path program 1 times [2021-11-12 22:52:08,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:08,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883079992] [2021-11-12 22:52:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:08,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:08,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:08,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:15,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2735 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:15,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:18,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:19,308 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:19,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883079992] [2021-11-12 22:52:19,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883079992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:19,308 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:19,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:52:19,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720002207] [2021-11-12 22:52:19,309 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:19,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:19,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:19,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:19,311 INFO L87 Difference]: Start difference. First operand 3280 states and 4754 transitions. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:52:21,646 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:27,640 INFO L93 Difference]: Finished difference Result 6541 states and 9508 transitions. [2021-11-12 22:52:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 320 [2021-11-12 22:52:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:27,674 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:52:27,675 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:52:27,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 635 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:27,704 INFO L933 BasicCegarLoop]: 2556 mSDtfsCounter, 2407 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7493.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2407 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.54ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8029.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:27,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2407 Valid, 3881 Invalid, 1290 Unknown, 0 Unchecked, 24.54ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 8029.68ms Time] [2021-11-12 22:52:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:52:28,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:52:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2564491654021244) internal successors, (2484), 2027 states have internal predecessors, (2484), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:52:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4752 transitions. [2021-11-12 22:52:28,056 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4752 transitions. Word has length 320 [2021-11-12 22:52:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:28,057 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4752 transitions. [2021-11-12 22:52:28,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:52:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4752 transitions. [2021-11-12 22:52:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-12 22:52:28,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:28,068 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:28,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:28,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,283 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash -987665394, now seen corresponding path program 1 times [2021-11-12 22:52:28,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:28,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689821863] [2021-11-12 22:52:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:28,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:28,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:28,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:52:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:35,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:38,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:39,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:39,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689821863] [2021-11-12 22:52:39,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689821863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:39,168 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:39,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:52:39,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129635908] [2021-11-12 22:52:39,169 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:39,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:39,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:39,170 INFO L87 Difference]: Start difference. First operand 3280 states and 4752 transitions. Second operand has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:52:41,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:46,634 INFO L93 Difference]: Finished difference Result 6541 states and 9504 transitions. [2021-11-12 22:52:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:52:46,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 321 [2021-11-12 22:52:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:46,667 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:52:46,667 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:52:46,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:46,688 INFO L933 BasicCegarLoop]: 2555 mSDtfsCounter, 2406 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6709.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2406 SdHoareTripleChecker+Valid, 3879 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.00ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7213.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:46,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2406 Valid, 3879 Invalid, 1290 Unknown, 0 Unchecked, 16.00ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7213.09ms Time] [2021-11-12 22:52:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:52:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:52:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.255437531613556) internal successors, (2482), 2027 states have internal predecessors, (2482), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:52:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4750 transitions. [2021-11-12 22:52:46,947 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4750 transitions. Word has length 321 [2021-11-12 22:52:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:46,948 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4750 transitions. [2021-11-12 22:52:46,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.2) internal successors, (231), 5 states have internal predecessors, (231), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:52:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4750 transitions. [2021-11-12 22:52:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-12 22:52:46,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:46,959 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:47,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:47,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:47,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1562986316, now seen corresponding path program 1 times [2021-11-12 22:52:47,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:47,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223160294] [2021-11-12 22:52:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:47,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:47,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:47,184 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:52:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:52:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:56,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:52:58,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:58,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223160294] [2021-11-12 22:52:58,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223160294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:58,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:52:58,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89167681] [2021-11-12 22:52:58,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:58,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:52:58,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:52:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:58,034 INFO L87 Difference]: Start difference. First operand 3280 states and 4750 transitions. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:00,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:05,291 INFO L93 Difference]: Finished difference Result 6541 states and 9500 transitions. [2021-11-12 22:53:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 322 [2021-11-12 22:53:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:05,320 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:53:05,320 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:53:05,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:05,337 INFO L933 BasicCegarLoop]: 2554 mSDtfsCounter, 2405 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6551.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.47ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7018.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:05,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2405 Valid, 3877 Invalid, 1290 Unknown, 0 Unchecked, 15.47ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7018.02ms Time] [2021-11-12 22:53:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:53:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:53:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2544258978249874) internal successors, (2480), 2027 states have internal predecessors, (2480), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:53:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4748 transitions. [2021-11-12 22:53:05,611 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4748 transitions. Word has length 322 [2021-11-12 22:53:05,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:05,612 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4748 transitions. [2021-11-12 22:53:05,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:05,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4748 transitions. [2021-11-12 22:53:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-12 22:53:05,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:05,619 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:05,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:05,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:05,835 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash -856672694, now seen corresponding path program 1 times [2021-11-12 22:53:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:05,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607523788] [2021-11-12 22:53:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:05,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:05,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:05,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:53:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:13,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:53:15,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:53:16,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:16,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607523788] [2021-11-12 22:53:16,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607523788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:16,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:16,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:53:16,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135156124] [2021-11-12 22:53:16,758 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:16,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:16,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:16,760 INFO L87 Difference]: Start difference. First operand 3280 states and 4748 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:19,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:24,269 INFO L93 Difference]: Finished difference Result 6541 states and 9496 transitions. [2021-11-12 22:53:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 323 [2021-11-12 22:53:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:24,299 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:53:24,299 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:53:24,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:24,315 INFO L933 BasicCegarLoop]: 2553 mSDtfsCounter, 2404 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6715.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 3875 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.49ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7193.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:24,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2404 Valid, 3875 Invalid, 1290 Unknown, 0 Unchecked, 16.49ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7193.79ms Time] [2021-11-12 22:53:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:53:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:53:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2534142640364188) internal successors, (2478), 2027 states have internal predecessors, (2478), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:53:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4746 transitions. [2021-11-12 22:53:24,596 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4746 transitions. Word has length 323 [2021-11-12 22:53:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:24,597 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4746 transitions. [2021-11-12 22:53:24,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4746 transitions. [2021-11-12 22:53:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-12 22:53:24,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:24,613 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:24,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:24,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:24,835 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1557825928, now seen corresponding path program 1 times [2021-11-12 22:53:24,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:24,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586521697] [2021-11-12 22:53:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:24,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:24,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:24,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:53:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:32,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:53:34,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:53:35,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:35,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586521697] [2021-11-12 22:53:35,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586521697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:35,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:35,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:53:35,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881277515] [2021-11-12 22:53:35,658 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:35,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:35,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:35,659 INFO L87 Difference]: Start difference. First operand 3280 states and 4746 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:38,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:53:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:43,909 INFO L93 Difference]: Finished difference Result 6541 states and 9492 transitions. [2021-11-12 22:53:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:43,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 324 [2021-11-12 22:53:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:43,935 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:53:43,935 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:53:43,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:43,949 INFO L933 BasicCegarLoop]: 2552 mSDtfsCounter, 3611 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1203 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7340.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3611 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.50ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7889.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:43,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3611 Valid, 3873 Invalid, 2436 Unknown, 0 Unchecked, 19.50ms Time], IncrementalHoareTripleChecker [1203 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7889.46ms Time] [2021-11-12 22:53:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:53:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:53:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2524026302478504) internal successors, (2476), 2027 states have internal predecessors, (2476), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:53:44,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4744 transitions. [2021-11-12 22:53:44,223 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4744 transitions. Word has length 324 [2021-11-12 22:53:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:44,224 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4744 transitions. [2021-11-12 22:53:44,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4744 transitions. [2021-11-12 22:53:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-12 22:53:44,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:44,231 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:44,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:44,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:44,450 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -787611514, now seen corresponding path program 1 times [2021-11-12 22:53:44,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:44,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407903083] [2021-11-12 22:53:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:44,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:44,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:44,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:44,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:53:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:52,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2740 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:53:54,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:53:55,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:55,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407903083] [2021-11-12 22:53:55,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407903083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:55,649 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:53:55,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:53:55,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556394118] [2021-11-12 22:53:55,649 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:55,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:53:55,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:53:55,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:53:55,651 INFO L87 Difference]: Start difference. First operand 3280 states and 4744 transitions. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:53:58,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:03,467 INFO L93 Difference]: Finished difference Result 6541 states and 9488 transitions. [2021-11-12 22:54:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 325 [2021-11-12 22:54:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:03,487 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:54:03,487 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:54:03,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:03,505 INFO L933 BasicCegarLoop]: 2551 mSDtfsCounter, 3608 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1203 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6911.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3608 SdHoareTripleChecker+Valid, 3871 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.43ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7443.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:03,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3608 Valid, 3871 Invalid, 2436 Unknown, 0 Unchecked, 17.43ms Time], IncrementalHoareTripleChecker [1203 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7443.10ms Time] [2021-11-12 22:54:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:54:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:54:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2513909964592818) internal successors, (2474), 2027 states have internal predecessors, (2474), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:54:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4742 transitions. [2021-11-12 22:54:03,792 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4742 transitions. Word has length 325 [2021-11-12 22:54:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:03,792 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4742 transitions. [2021-11-12 22:54:03,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:54:03,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4742 transitions. [2021-11-12 22:54:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-12 22:54:03,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:03,800 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:03,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:04,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:04,027 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:04,028 INFO L85 PathProgramCache]: Analyzing trace with hash -367211580, now seen corresponding path program 1 times [2021-11-12 22:54:04,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:04,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326307082] [2021-11-12 22:54:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:04,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:04,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:04,035 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:04,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:54:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:11,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:54:13,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:54:14,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:14,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326307082] [2021-11-12 22:54:14,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326307082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:14,950 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:14,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:54:14,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060804816] [2021-11-12 22:54:14,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:14,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:14,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:14,951 INFO L87 Difference]: Start difference. First operand 3280 states and 4742 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:54:17,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:22,635 INFO L93 Difference]: Finished difference Result 6541 states and 9484 transitions. [2021-11-12 22:54:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 326 [2021-11-12 22:54:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:22,652 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:54:22,653 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:54:22,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 647 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:22,665 INFO L933 BasicCegarLoop]: 2550 mSDtfsCounter, 3605 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1203 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6778.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3605 SdHoareTripleChecker+Valid, 3869 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.29ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7397.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:22,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3605 Valid, 3869 Invalid, 2436 Unknown, 0 Unchecked, 18.29ms Time], IncrementalHoareTripleChecker [1203 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7397.97ms Time] [2021-11-12 22:54:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:54:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:54:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2503793626707131) internal successors, (2472), 2027 states have internal predecessors, (2472), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:54:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4740 transitions. [2021-11-12 22:54:22,950 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4740 transitions. Word has length 326 [2021-11-12 22:54:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:22,951 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4740 transitions. [2021-11-12 22:54:22,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:54:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4740 transitions. [2021-11-12 22:54:22,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-12 22:54:22,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:22,959 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:23,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:23,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:23,179 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:23,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:23,180 INFO L85 PathProgramCache]: Analyzing trace with hash -105198910, now seen corresponding path program 1 times [2021-11-12 22:54:23,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:23,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451927707] [2021-11-12 22:54:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:23,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:23,184 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:23,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:30,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2742 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:54:30,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:54:32,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:54:34,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:34,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451927707] [2021-11-12 22:54:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451927707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:34,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:34,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:54:34,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092927879] [2021-11-12 22:54:34,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:34,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:34,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:34,069 INFO L87 Difference]: Start difference. First operand 3280 states and 4740 transitions. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:54:36,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:41,728 INFO L93 Difference]: Finished difference Result 6541 states and 9480 transitions. [2021-11-12 22:54:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:41,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 327 [2021-11-12 22:54:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:41,744 INFO L225 Difference]: With dead ends: 6541 [2021-11-12 22:54:41,745 INFO L226 Difference]: Without dead ends: 3280 [2021-11-12 22:54:41,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:41,757 INFO L933 BasicCegarLoop]: 2549 mSDtfsCounter, 3602 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1203 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6851.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 3867 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.80ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7369.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:41,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3602 Valid, 3867 Invalid, 2436 Unknown, 0 Unchecked, 17.80ms Time], IncrementalHoareTripleChecker [1203 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7369.24ms Time] [2021-11-12 22:54:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-11-12 22:54:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2021-11-12 22:54:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 1977 states have (on average 1.2493677288821448) internal successors, (2470), 2027 states have internal predecessors, (2470), 1129 states have call successors, (1129), 171 states have call predecessors, (1129), 173 states have return successors, (1139), 1110 states have call predecessors, (1139), 1129 states have call successors, (1139) [2021-11-12 22:54:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4738 transitions. [2021-11-12 22:54:42,020 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4738 transitions. Word has length 327 [2021-11-12 22:54:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:42,021 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 4738 transitions. [2021-11-12 22:54:42,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:54:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4738 transitions. [2021-11-12 22:54:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-12 22:54:42,029 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:42,029 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:54:42,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:42,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:42,243 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash -458224128, now seen corresponding path program 1 times [2021-11-12 22:54:42,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:42,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145107255] [2021-11-12 22:54:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:42,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:42,251 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:42,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:54:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:54:52,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:54:53,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:53,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145107255] [2021-11-12 22:54:53,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145107255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:53,336 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:54:53,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:54:53,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036863868] [2021-11-12 22:54:53,336 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:53,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:54:53,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:54:53,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:54:53,337 INFO L87 Difference]: Start difference. First operand 3280 states and 4738 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:54:55,616 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:02,978 INFO L93 Difference]: Finished difference Result 7296 states and 10544 transitions. [2021-11-12 22:55:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:55:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 328 [2021-11-12 22:55:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:02,997 INFO L225 Difference]: With dead ends: 7296 [2021-11-12 22:55:02,997 INFO L226 Difference]: Without dead ends: 4035 [2021-11-12 22:55:03,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:03,012 INFO L933 BasicCegarLoop]: 3487 mSDtfsCounter, 4154 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 904 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8520.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4154 SdHoareTripleChecker+Valid, 5227 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.39ms SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9167.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:03,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4154 Valid, 5227 Invalid, 2655 Unknown, 0 Unchecked, 25.39ms Time], IncrementalHoareTripleChecker [904 Valid, 1750 Invalid, 1 Unknown, 0 Unchecked, 9167.75ms Time] [2021-11-12 22:55:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2021-11-12 22:55:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 4029. [2021-11-12 22:55:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 2380 states have (on average 1.2399159663865547) internal successors, (2951), 2436 states have internal predecessors, (2951), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:55:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 5797 transitions. [2021-11-12 22:55:03,428 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 5797 transitions. Word has length 328 [2021-11-12 22:55:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:03,429 INFO L470 AbstractCegarLoop]: Abstraction has 4029 states and 5797 transitions. [2021-11-12 22:55:03,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:55:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 5797 transitions. [2021-11-12 22:55:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-12 22:55:03,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:03,436 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:03,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:03,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:03,652 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1597412606, now seen corresponding path program 1 times [2021-11-12 22:55:03,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:03,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588326074] [2021-11-12 22:55:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:03,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:03,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:03,659 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:03,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:55:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:11,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2744 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:55:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:55:13,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:55:14,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:14,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588326074] [2021-11-12 22:55:14,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588326074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:14,719 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:14,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:55:14,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998741540] [2021-11-12 22:55:14,720 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:14,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:14,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:14,721 INFO L87 Difference]: Start difference. First operand 4029 states and 5797 transitions. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:55:16,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:22,140 INFO L93 Difference]: Finished difference Result 6432 states and 9289 transitions. [2021-11-12 22:55:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:55:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 329 [2021-11-12 22:55:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:22,164 INFO L225 Difference]: With dead ends: 6432 [2021-11-12 22:55:22,164 INFO L226 Difference]: Without dead ends: 4029 [2021-11-12 22:55:22,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:22,177 INFO L933 BasicCegarLoop]: 2548 mSDtfsCounter, 2399 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6535.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2399 SdHoareTripleChecker+Valid, 3865 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.26ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7005.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:22,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2399 Valid, 3865 Invalid, 1290 Unknown, 0 Unchecked, 15.26ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7005.44ms Time] [2021-11-12 22:55:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-11-12 22:55:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4029. [2021-11-12 22:55:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 2380 states have (on average 1.2394957983193278) internal successors, (2950), 2436 states have internal predecessors, (2950), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:55:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 5796 transitions. [2021-11-12 22:55:22,625 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 5796 transitions. Word has length 329 [2021-11-12 22:55:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:22,626 INFO L470 AbstractCegarLoop]: Abstraction has 4029 states and 5796 transitions. [2021-11-12 22:55:22,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:55:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 5796 transitions. [2021-11-12 22:55:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-12 22:55:22,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:22,634 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:22,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:22,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:22,855 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:22,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1012158524, now seen corresponding path program 1 times [2021-11-12 22:55:22,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:22,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750075047] [2021-11-12 22:55:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:22,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:22,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:22,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:22,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:55:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:55:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:55:32,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:55:33,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:33,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750075047] [2021-11-12 22:55:33,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750075047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:33,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:55:33,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:55:33,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585842968] [2021-11-12 22:55:33,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:33,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:55:33,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:55:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:33,800 INFO L87 Difference]: Start difference. First operand 4029 states and 5796 transitions. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:55:36,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:41,182 INFO L93 Difference]: Finished difference Result 6432 states and 9287 transitions. [2021-11-12 22:55:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:55:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 330 [2021-11-12 22:55:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:41,207 INFO L225 Difference]: With dead ends: 6432 [2021-11-12 22:55:41,207 INFO L226 Difference]: Without dead ends: 4029 [2021-11-12 22:55:41,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:55:41,220 INFO L933 BasicCegarLoop]: 2547 mSDtfsCounter, 2398 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6558.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 3863 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.48ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7027.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:41,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2398 Valid, 3863 Invalid, 1290 Unknown, 0 Unchecked, 15.48ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7027.72ms Time] [2021-11-12 22:55:41,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2021-11-12 22:55:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 4029. [2021-11-12 22:55:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 2380 states have (on average 1.2390756302521009) internal successors, (2949), 2436 states have internal predecessors, (2949), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:55:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 5795 transitions. [2021-11-12 22:55:41,832 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 5795 transitions. Word has length 330 [2021-11-12 22:55:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:41,833 INFO L470 AbstractCegarLoop]: Abstraction has 4029 states and 5795 transitions. [2021-11-12 22:55:41,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:55:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 5795 transitions. [2021-11-12 22:55:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-12 22:55:41,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:41,841 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:41,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:42,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:42,067 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:42,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1292215120, now seen corresponding path program 1 times [2021-11-12 22:55:42,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:42,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727538936] [2021-11-12 22:55:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:42,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:42,072 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:42,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:55:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:48,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 2612 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:55:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-12 22:55:50,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-11-12 22:55:52,003 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:52,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727538936] [2021-11-12 22:55:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727538936] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:55:52,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:55:52,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 23 [2021-11-12 22:55:52,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112451809] [2021-11-12 22:55:52,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:55:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:52,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:55:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:55:52,006 INFO L87 Difference]: Start difference. First operand 4029 states and 5795 transitions. Second operand has 13 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 5 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-12 22:55:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:55,553 INFO L93 Difference]: Finished difference Result 8253 states and 11888 transitions. [2021-11-12 22:55:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:55:55,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 5 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) Word has length 352 [2021-11-12 22:55:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:55,580 INFO L225 Difference]: With dead ends: 8253 [2021-11-12 22:55:55,581 INFO L226 Difference]: Without dead ends: 4241 [2021-11-12 22:55:55,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:55:55,599 INFO L933 BasicCegarLoop]: 2653 mSDtfsCounter, 220 mSDsluCounter, 28782 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1878.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 31435 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.75ms SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1996.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:55,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 31435 Invalid, 705 Unknown, 0 Unchecked, 29.75ms Time], IncrementalHoareTripleChecker [153 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 1996.68ms Time] [2021-11-12 22:55:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-11-12 22:55:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 4033. [2021-11-12 22:55:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2384 states have (on average 1.2395134228187918) internal successors, (2955), 2440 states have internal predecessors, (2955), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:55:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5801 transitions. [2021-11-12 22:55:56,242 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5801 transitions. Word has length 352 [2021-11-12 22:55:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 4033 states and 5801 transitions. [2021-11-12 22:55:56,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 5 states have call successors, (48), 2 states have call predecessors, (48), 4 states have return successors, (44), 5 states have call predecessors, (44), 5 states have call successors, (44) [2021-11-12 22:55:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5801 transitions. [2021-11-12 22:55:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-12 22:55:56,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:56,247 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:55:56,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:56,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:56,463 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash 163667770, now seen corresponding path program 1 times [2021-11-12 22:55:56,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:56,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348958750] [2021-11-12 22:55:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:56,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:56,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:56,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:56,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:56:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:56:04,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:56:06,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:56:07,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:07,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348958750] [2021-11-12 22:56:07,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348958750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:07,483 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:07,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:56:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133411453] [2021-11-12 22:56:07,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:07,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:07,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:07,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:07,485 INFO L87 Difference]: Start difference. First operand 4033 states and 5801 transitions. Second operand has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:56:09,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:14,923 INFO L93 Difference]: Finished difference Result 6438 states and 9294 transitions. [2021-11-12 22:56:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:14,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 331 [2021-11-12 22:56:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:14,944 INFO L225 Difference]: With dead ends: 6438 [2021-11-12 22:56:14,945 INFO L226 Difference]: Without dead ends: 4033 [2021-11-12 22:56:14,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:14,956 INFO L933 BasicCegarLoop]: 2546 mSDtfsCounter, 2397 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6540.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.13ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7004.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:14,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 3861 Invalid, 1290 Unknown, 0 Unchecked, 15.13ms Time], IncrementalHoareTripleChecker [57 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7004.20ms Time] [2021-11-12 22:56:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-11-12 22:56:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 4033. [2021-11-12 22:56:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2384 states have (on average 1.2390939597315436) internal successors, (2954), 2440 states have internal predecessors, (2954), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:56:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5800 transitions. [2021-11-12 22:56:15,424 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5800 transitions. Word has length 331 [2021-11-12 22:56:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:15,425 INFO L470 AbstractCegarLoop]: Abstraction has 4033 states and 5800 transitions. [2021-11-12 22:56:15,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.2) internal successors, (251), 5 states have internal predecessors, (251), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:56:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5800 transitions. [2021-11-12 22:56:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-12 22:56:15,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:15,430 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:15,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:15,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:15,655 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -255225224, now seen corresponding path program 1 times [2021-11-12 22:56:15,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:15,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621233614] [2021-11-12 22:56:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:15,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:15,663 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:15,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:56:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:23,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:56:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:56:25,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:56:26,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:26,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621233614] [2021-11-12 22:56:26,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621233614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:26,763 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:26,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:56:26,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789540932] [2021-11-12 22:56:26,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:26,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:26,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:26,765 INFO L87 Difference]: Start difference. First operand 4033 states and 5800 transitions. Second operand has 5 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:56:29,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:34,612 INFO L93 Difference]: Finished difference Result 6438 states and 9292 transitions. [2021-11-12 22:56:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 332 [2021-11-12 22:56:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:34,630 INFO L225 Difference]: With dead ends: 6438 [2021-11-12 22:56:34,630 INFO L226 Difference]: Without dead ends: 4033 [2021-11-12 22:56:34,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 659 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:34,643 INFO L933 BasicCegarLoop]: 2545 mSDtfsCounter, 3589 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1203 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6864.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3589 SdHoareTripleChecker+Valid, 3859 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.29ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7392.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:34,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3589 Valid, 3859 Invalid, 2436 Unknown, 0 Unchecked, 18.29ms Time], IncrementalHoareTripleChecker [1203 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7392.07ms Time] [2021-11-12 22:56:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-11-12 22:56:35,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 4033. [2021-11-12 22:56:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2384 states have (on average 1.2386744966442953) internal successors, (2953), 2440 states have internal predecessors, (2953), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:56:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5799 transitions. [2021-11-12 22:56:35,090 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5799 transitions. Word has length 332 [2021-11-12 22:56:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:35,091 INFO L470 AbstractCegarLoop]: Abstraction has 4033 states and 5799 transitions. [2021-11-12 22:56:35,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:56:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5799 transitions. [2021-11-12 22:56:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-12 22:56:35,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:35,096 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:35,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:35,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:35,311 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -241489546, now seen corresponding path program 1 times [2021-11-12 22:56:35,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:35,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523725462] [2021-11-12 22:56:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:35,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:35,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:35,319 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:35,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:56:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:56:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:56:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:56:46,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:46,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523725462] [2021-11-12 22:56:46,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523725462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:56:46,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:56:46,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 5 [2021-11-12 22:56:46,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130823636] [2021-11-12 22:56:46,407 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:46,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:56:46,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:56:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:46,409 INFO L87 Difference]: Start difference. First operand 4033 states and 5799 transitions. Second operand has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:56:48,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:54,152 INFO L93 Difference]: Finished difference Result 6438 states and 9290 transitions. [2021-11-12 22:56:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:56:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) Word has length 333 [2021-11-12 22:56:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:54,176 INFO L225 Difference]: With dead ends: 6438 [2021-11-12 22:56:54,176 INFO L226 Difference]: Without dead ends: 4033 [2021-11-12 22:56:54,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:56:54,190 INFO L933 BasicCegarLoop]: 2544 mSDtfsCounter, 3586 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 1203 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6824.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3586 SdHoareTripleChecker+Valid, 3857 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.47ms SdHoareTripleChecker+Time, 1203 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7341.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:54,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3586 Valid, 3857 Invalid, 2436 Unknown, 0 Unchecked, 18.47ms Time], IncrementalHoareTripleChecker [1203 Valid, 1232 Invalid, 1 Unknown, 0 Unchecked, 7341.65ms Time] [2021-11-12 22:56:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-11-12 22:56:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 4033. [2021-11-12 22:56:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2384 states have (on average 1.238255033557047) internal successors, (2952), 2440 states have internal predecessors, (2952), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:56:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5798 transitions. [2021-11-12 22:56:54,837 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5798 transitions. Word has length 333 [2021-11-12 22:56:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:54,838 INFO L470 AbstractCegarLoop]: Abstraction has 4033 states and 5798 transitions. [2021-11-12 22:56:54,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 3 states have call successors, (88), 3 states have call predecessors, (88), 4 states have return successors, (82), 4 states have call predecessors, (82), 3 states have call successors, (82) [2021-11-12 22:56:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5798 transitions. [2021-11-12 22:56:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-12 22:56:54,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:54,843 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 8, 8, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:56:54,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:55,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:56:55,071 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash -212860395, now seen corresponding path program 1 times [2021-11-12 22:56:55,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:55,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392809650] [2021-11-12 22:56:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:55,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:55,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:55,077 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:55,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:57:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:02,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 2748 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:57:02,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:57:03,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-12 22:57:03,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:03,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392809650] [2021-11-12 22:57:03,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392809650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:03,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:03,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-12 22:57:03,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881373619] [2021-11-12 22:57:03,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:03,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:57:03,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:03,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:57:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:57:03,865 INFO L87 Difference]: Start difference. First operand 4033 states and 5798 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 1 states have call successors, (41) [2021-11-12 22:57:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:04,214 INFO L93 Difference]: Finished difference Result 4041 states and 5805 transitions. [2021-11-12 22:57:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 1 states have call successors, (41) Word has length 333 [2021-11-12 22:57:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:04,233 INFO L225 Difference]: With dead ends: 4041 [2021-11-12 22:57:04,233 INFO L226 Difference]: Without dead ends: 4039 [2021-11-12 22:57:04,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:57:04,237 INFO L933 BasicCegarLoop]: 2546 mSDtfsCounter, 8 mSDsluCounter, 7635 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10181 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.75ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:04,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10181 Invalid, 11 Unknown, 0 Unchecked, 8.15ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 29.75ms Time] [2021-11-12 22:57:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2021-11-12 22:57:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 4033. [2021-11-12 22:57:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2384 states have (on average 1.2378355704697988) internal successors, (2951), 2440 states have internal predecessors, (2951), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 229 states have return successors, (1427), 1397 states have call predecessors, (1427), 1419 states have call successors, (1427) [2021-11-12 22:57:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5797 transitions. [2021-11-12 22:57:04,604 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5797 transitions. Word has length 333 [2021-11-12 22:57:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:04,604 INFO L470 AbstractCegarLoop]: Abstraction has 4033 states and 5797 transitions. [2021-11-12 22:57:04,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (44), 1 states have call predecessors, (44), 2 states have return successors, (41), 2 states have call predecessors, (41), 1 states have call successors, (41) [2021-11-12 22:57:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5797 transitions. [2021-11-12 22:57:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-12 22:57:04,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:04,611 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 8, 8, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:04,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:04,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash -263846023, now seen corresponding path program 1 times [2021-11-12 22:57:04,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:04,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5864624] [2021-11-12 22:57:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:04,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:04,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:04,823 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:04,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:57:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2993 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:57:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-12 22:57:14,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-11-12 22:57:16,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:16,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5864624] [2021-11-12 22:57:16,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5864624] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:16,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:16,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-11-12 22:57:16,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042911872] [2021-11-12 22:57:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:16,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:57:16,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:57:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:57:16,626 INFO L87 Difference]: Start difference. First operand 4033 states and 5797 transitions. Second operand has 15 states, 14 states have (on average 12.928571428571429) internal successors, (181), 13 states have internal predecessors, (181), 5 states have call successors, (61), 2 states have call predecessors, (61), 5 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) [2021-11-12 22:57:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:20,217 INFO L93 Difference]: Finished difference Result 8263 states and 11898 transitions. [2021-11-12 22:57:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:57:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 12.928571428571429) internal successors, (181), 13 states have internal predecessors, (181), 5 states have call successors, (61), 2 states have call predecessors, (61), 5 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) Word has length 433 [2021-11-12 22:57:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:20,235 INFO L225 Difference]: With dead ends: 8263 [2021-11-12 22:57:20,235 INFO L226 Difference]: Without dead ends: 4247 [2021-11-12 22:57:20,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:57:20,252 INFO L933 BasicCegarLoop]: 2654 mSDtfsCounter, 208 mSDsluCounter, 34080 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1986.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 36734 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.70ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2111.66ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:20,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 36734 Invalid, 744 Unknown, 0 Unchecked, 32.70ms Time], IncrementalHoareTripleChecker [142 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 2111.66ms Time] [2021-11-12 22:57:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-11-12 22:57:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 4039. [2021-11-12 22:57:20,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 2388 states have (on average 1.2374371859296482) internal successors, (2955), 2444 states have internal predecessors, (2955), 1419 states have call successors, (1419), 227 states have call predecessors, (1419), 231 states have return successors, (1431), 1399 states have call predecessors, (1431), 1419 states have call successors, (1431) [2021-11-12 22:57:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 5805 transitions. [2021-11-12 22:57:20,723 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 5805 transitions. Word has length 433 [2021-11-12 22:57:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:20,724 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 5805 transitions. [2021-11-12 22:57:20,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 12.928571428571429) internal successors, (181), 13 states have internal predecessors, (181), 5 states have call successors, (61), 2 states have call predecessors, (61), 5 states have return successors, (57), 6 states have call predecessors, (57), 5 states have call successors, (57) [2021-11-12 22:57:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 5805 transitions. [2021-11-12 22:57:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-11-12 22:57:20,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:20,739 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:20,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:20,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:20,955 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 78183881, now seen corresponding path program 1 times [2021-11-12 22:57:20,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:20,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089724525] [2021-11-12 22:57:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:20,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:20,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:20,962 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:20,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:57:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 3253 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:57:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2021-11-12 22:57:30,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 36 proven. 26 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2021-11-12 22:57:33,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:33,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089724525] [2021-11-12 22:57:33,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089724525] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:57:33,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:57:33,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 29 [2021-11-12 22:57:33,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806604159] [2021-11-12 22:57:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:33,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:57:33,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:57:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:57:33,791 INFO L87 Difference]: Start difference. First operand 4039 states and 5805 transitions. Second operand has 16 states, 15 states have (on average 13.933333333333334) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (74), 2 states have call predecessors, (74), 5 states have return successors, (70), 7 states have call predecessors, (70), 6 states have call successors, (70) [2021-11-12 22:57:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:38,500 INFO L93 Difference]: Finished difference Result 8335 states and 11993 transitions. [2021-11-12 22:57:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-12 22:57:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 13.933333333333334) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (74), 2 states have call predecessors, (74), 5 states have return successors, (70), 7 states have call predecessors, (70), 6 states have call successors, (70) Word has length 512 [2021-11-12 22:57:38,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:38,518 INFO L225 Difference]: With dead ends: 8335 [2021-11-12 22:57:38,519 INFO L226 Difference]: Without dead ends: 4313 [2021-11-12 22:57:38,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2021-11-12 22:57:38,531 INFO L933 BasicCegarLoop]: 2656 mSDtfsCounter, 222 mSDsluCounter, 36757 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2404.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 39413 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.87ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2550.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:38,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 39413 Invalid, 897 Unknown, 0 Unchecked, 37.87ms Time], IncrementalHoareTripleChecker [154 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 2550.42ms Time] [2021-11-12 22:57:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-11-12 22:57:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 4040. [2021-11-12 22:57:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 2388 states have (on average 1.2374371859296482) internal successors, (2955), 2444 states have internal predecessors, (2955), 1421 states have call successors, (1421), 227 states have call predecessors, (1421), 230 states have return successors, (1431), 1400 states have call predecessors, (1431), 1421 states have call successors, (1431) [2021-11-12 22:57:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 5807 transitions. [2021-11-12 22:57:38,923 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 5807 transitions. Word has length 512 [2021-11-12 22:57:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:38,924 INFO L470 AbstractCegarLoop]: Abstraction has 4040 states and 5807 transitions. [2021-11-12 22:57:38,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 13.933333333333334) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (74), 2 states have call predecessors, (74), 5 states have return successors, (70), 7 states have call predecessors, (70), 6 states have call successors, (70) [2021-11-12 22:57:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 5807 transitions. [2021-11-12 22:57:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-11-12 22:57:38,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:38,935 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 8, 8, 8, 8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:38,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:39,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:39,136 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1311190398, now seen corresponding path program 1 times [2021-11-12 22:57:39,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:39,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857916692] [2021-11-12 22:57:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:39,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:39,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:39,142 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:39,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:57:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:47,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 3411 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:57:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-11-12 22:57:49,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2021-11-12 22:57:51,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:57:51,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857916692] [2021-11-12 22:57:51,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857916692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:57:51,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:57:51,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-12 22:57:51,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48759565] [2021-11-12 22:57:51,222 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:57:51,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 22:57:51,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 22:57:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:57:51,224 INFO L87 Difference]: Start difference. First operand 4040 states and 5807 transitions. Second operand has 9 states, 7 states have (on average 39.142857142857146) internal successors, (274), 9 states have internal predecessors, (274), 6 states have call successors, (108), 2 states have call predecessors, (108), 5 states have return successors, (105), 4 states have call predecessors, (105), 6 states have call successors, (105) [2021-11-12 22:57:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:51,860 INFO L93 Difference]: Finished difference Result 6462 states and 9314 transitions. [2021-11-12 22:57:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:57:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 39.142857142857146) internal successors, (274), 9 states have internal predecessors, (274), 6 states have call successors, (108), 2 states have call predecessors, (108), 5 states have return successors, (105), 4 states have call predecessors, (105), 6 states have call successors, (105) Word has length 572 [2021-11-12 22:57:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:51,879 INFO L225 Difference]: With dead ends: 6462 [2021-11-12 22:57:51,880 INFO L226 Difference]: Without dead ends: 4044 [2021-11-12 22:57:51,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1135 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:57:51,894 INFO L933 BasicCegarLoop]: 2540 mSDtfsCounter, 26 mSDsluCounter, 7604 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10144 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.47ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:51,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 10144 Invalid, 39 Unknown, 0 Unchecked, 11.47ms Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 135.94ms Time] [2021-11-12 22:57:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-11-12 22:57:52,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 4040. [2021-11-12 22:57:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 2388 states have (on average 1.2370184254606365) internal successors, (2954), 2444 states have internal predecessors, (2954), 1421 states have call successors, (1421), 227 states have call predecessors, (1421), 230 states have return successors, (1431), 1400 states have call predecessors, (1431), 1421 states have call successors, (1431) [2021-11-12 22:57:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 5806 transitions. [2021-11-12 22:57:52,235 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 5806 transitions. Word has length 572 [2021-11-12 22:57:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:52,235 INFO L470 AbstractCegarLoop]: Abstraction has 4040 states and 5806 transitions. [2021-11-12 22:57:52,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 39.142857142857146) internal successors, (274), 9 states have internal predecessors, (274), 6 states have call successors, (108), 2 states have call predecessors, (108), 5 states have return successors, (105), 4 states have call predecessors, (105), 6 states have call successors, (105) [2021-11-12 22:57:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 5806 transitions. [2021-11-12 22:57:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2021-11-12 22:57:52,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:52,309 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 17, 17, 17, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:57:52,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:52,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:57:52,510 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:52,510 INFO L85 PathProgramCache]: Analyzing trace with hash 933939572, now seen corresponding path program 1 times [2021-11-12 22:57:52,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:52,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490872193] [2021-11-12 22:57:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:52,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:52,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:52,515 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:52,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:57:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 3318 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:57:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4543 backedges. 964 proven. 0 refuted. 0 times theorem prover too weak. 3579 trivial. 0 not checked. [2021-11-12 22:58:01,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4543 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2021-11-12 22:58:03,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:03,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490872193] [2021-11-12 22:58:03,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490872193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:58:03,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:58:03,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:58:03,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988389936] [2021-11-12 22:58:03,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:03,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:58:03,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:03,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:58:03,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:58:03,050 INFO L87 Difference]: Start difference. First operand 4040 states and 5806 transitions. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2021-11-12 22:58:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:03,843 INFO L93 Difference]: Finished difference Result 8276 states and 11901 transitions. [2021-11-12 22:58:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:58:03,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 671 [2021-11-12 22:58:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:03,860 INFO L225 Difference]: With dead ends: 8276 [2021-11-12 22:58:03,860 INFO L226 Difference]: Without dead ends: 4255 [2021-11-12 22:58:03,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1340 GetRequests, 1338 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:58:03,872 INFO L933 BasicCegarLoop]: 2658 mSDtfsCounter, 154 mSDsluCounter, 2592 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 246.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 5250 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.37ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 272.85ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:03,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 5250 Invalid, 64 Unknown, 0 Unchecked, 8.37ms Time], IncrementalHoareTripleChecker [29 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 272.85ms Time] [2021-11-12 22:58:03,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-11-12 22:58:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 4042. [2021-11-12 22:58:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 2390 states have (on average 1.2368200836820085) internal successors, (2956), 2446 states have internal predecessors, (2956), 1421 states have call successors, (1421), 227 states have call predecessors, (1421), 230 states have return successors, (1431), 1400 states have call predecessors, (1431), 1421 states have call successors, (1431) [2021-11-12 22:58:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 5808 transitions. [2021-11-12 22:58:04,309 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 5808 transitions. Word has length 671 [2021-11-12 22:58:04,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:04,309 INFO L470 AbstractCegarLoop]: Abstraction has 4042 states and 5808 transitions. [2021-11-12 22:58:04,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 4 states have internal predecessors, (239), 2 states have call successors, (126), 2 states have call predecessors, (126), 2 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2021-11-12 22:58:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 5808 transitions. [2021-11-12 22:58:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2021-11-12 22:58:04,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:04,326 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 15, 15, 15, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:04,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:04,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:04,547 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1814090908, now seen corresponding path program 1 times [2021-11-12 22:58:04,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:04,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329359079] [2021-11-12 22:58:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:04,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:04,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:04,555 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:04,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:58:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 3286 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:58:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 4016 trivial. 0 not checked. [2021-11-12 22:58:13,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4407 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 4357 trivial. 0 not checked. [2021-11-12 22:58:16,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:16,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329359079] [2021-11-12 22:58:16,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329359079] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:16,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 27 [2021-11-12 22:58:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877287795] [2021-11-12 22:58:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:16,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 22:58:16,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 22:58:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:58:16,456 INFO L87 Difference]: Start difference. First operand 4042 states and 5808 transitions. Second operand has 15 states, 14 states have (on average 13.071428571428571) internal successors, (183), 13 states have internal predecessors, (183), 5 states have call successors, (70), 2 states have call predecessors, (70), 5 states have return successors, (66), 6 states have call predecessors, (66), 5 states have call successors, (66) [2021-11-12 22:58:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:19,975 INFO L93 Difference]: Finished difference Result 8284 states and 11925 transitions. [2021-11-12 22:58:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:58:19,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 13.071428571428571) internal successors, (183), 13 states have internal predecessors, (183), 5 states have call successors, (70), 2 states have call predecessors, (70), 5 states have return successors, (66), 6 states have call predecessors, (66), 5 states have call successors, (66) Word has length 655 [2021-11-12 22:58:19,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:20,002 INFO L225 Difference]: With dead ends: 8284 [2021-11-12 22:58:20,002 INFO L226 Difference]: Without dead ends: 4259 [2021-11-12 22:58:20,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1285 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:58:20,021 INFO L933 BasicCegarLoop]: 2656 mSDtfsCounter, 208 mSDsluCounter, 34098 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1947.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 36754 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.26ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2068.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:20,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 36754 Invalid, 746 Unknown, 0 Unchecked, 32.26ms Time], IncrementalHoareTripleChecker [142 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 2068.45ms Time] [2021-11-12 22:58:20,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-11-12 22:58:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 4048. [2021-11-12 22:58:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 2394 states have (on average 1.236424394319131) internal successors, (2960), 2450 states have internal predecessors, (2960), 1421 states have call successors, (1421), 227 states have call predecessors, (1421), 232 states have return successors, (1435), 1402 states have call predecessors, (1435), 1421 states have call successors, (1435) [2021-11-12 22:58:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 5816 transitions. [2021-11-12 22:58:20,516 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 5816 transitions. Word has length 655 [2021-11-12 22:58:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:20,517 INFO L470 AbstractCegarLoop]: Abstraction has 4048 states and 5816 transitions. [2021-11-12 22:58:20,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 13.071428571428571) internal successors, (183), 13 states have internal predecessors, (183), 5 states have call successors, (70), 2 states have call predecessors, (70), 5 states have return successors, (66), 6 states have call predecessors, (66), 5 states have call successors, (66) [2021-11-12 22:58:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 5816 transitions. [2021-11-12 22:58:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 815 [2021-11-12 22:58:20,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:20,601 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 21, 21, 21, 11, 11, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:20,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-12 22:58:20,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:20,802 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash 863074157, now seen corresponding path program 1 times [2021-11-12 22:58:20,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:20,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473701383] [2021-11-12 22:58:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:20,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:20,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:20,808 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:20,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:58:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 3730 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:58:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4947 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 4351 trivial. 0 not checked. [2021-11-12 22:58:31,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4947 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 4874 trivial. 0 not checked. [2021-11-12 22:58:34,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:34,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473701383] [2021-11-12 22:58:34,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473701383] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:34,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:34,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 29 [2021-11-12 22:58:34,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34853806] [2021-11-12 22:58:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:34,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-12 22:58:34,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-12 22:58:34,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:58:34,530 INFO L87 Difference]: Start difference. First operand 4048 states and 5816 transitions. Second operand has 16 states, 15 states have (on average 17.2) internal successors, (258), 14 states have internal predecessors, (258), 6 states have call successors, (90), 2 states have call predecessors, (90), 5 states have return successors, (86), 7 states have call predecessors, (86), 6 states have call successors, (86) [2021-11-12 22:58:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:38,625 INFO L93 Difference]: Finished difference Result 6704 states and 9678 transitions. [2021-11-12 22:58:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 22:58:38,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 17.2) internal successors, (258), 14 states have internal predecessors, (258), 6 states have call successors, (90), 2 states have call predecessors, (90), 5 states have return successors, (86), 7 states have call predecessors, (86), 6 states have call successors, (86) Word has length 814 [2021-11-12 22:58:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:38,640 INFO L225 Difference]: With dead ends: 6704 [2021-11-12 22:58:38,640 INFO L226 Difference]: Without dead ends: 4287 [2021-11-12 22:58:38,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1640 GetRequests, 1601 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:58:38,648 INFO L933 BasicCegarLoop]: 2668 mSDtfsCounter, 212 mSDsluCounter, 36899 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2263.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 39567 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.62ms SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2399.62ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:38,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 39567 Invalid, 807 Unknown, 0 Unchecked, 37.62ms Time], IncrementalHoareTripleChecker [144 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 2399.62ms Time] [2021-11-12 22:58:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2021-11-12 22:58:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 4060. [2021-11-12 22:58:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2401 states have (on average 1.2357351103706788) internal successors, (2967), 2458 states have internal predecessors, (2967), 1425 states have call successors, (1425), 227 states have call predecessors, (1425), 233 states have return successors, (1443), 1406 states have call predecessors, (1443), 1425 states have call successors, (1443) [2021-11-12 22:58:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 5835 transitions. [2021-11-12 22:58:38,963 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 5835 transitions. Word has length 814 [2021-11-12 22:58:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:38,963 INFO L470 AbstractCegarLoop]: Abstraction has 4060 states and 5835 transitions. [2021-11-12 22:58:38,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 17.2) internal successors, (258), 14 states have internal predecessors, (258), 6 states have call successors, (90), 2 states have call predecessors, (90), 5 states have return successors, (86), 7 states have call predecessors, (86), 6 states have call successors, (86) [2021-11-12 22:58:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 5835 transitions. [2021-11-12 22:58:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2021-11-12 22:58:38,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:38,971 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 8, 8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:39,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:39,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:39,172 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1210081805, now seen corresponding path program 1 times [2021-11-12 22:58:39,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:39,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547498138] [2021-11-12 22:58:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:39,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:39,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:39,178 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:39,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:58:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 3409 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:58:47,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2021-11-12 22:58:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1082 trivial. 0 not checked. [2021-11-12 22:58:51,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:51,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547498138] [2021-11-12 22:58:51,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547498138] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:58:51,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:58:51,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-12 22:58:51,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875874264] [2021-11-12 22:58:51,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:58:51,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:58:51,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:58:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:58:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:58:51,161 INFO L87 Difference]: Start difference. First operand 4060 states and 5835 transitions. Second operand has 8 states, 8 states have (on average 29.625) internal successors, (237), 6 states have internal predecessors, (237), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (69), 4 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 22:58:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:51,644 INFO L93 Difference]: Finished difference Result 6496 states and 9365 transitions. [2021-11-12 22:58:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:58:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 6 states have internal predecessors, (237), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (69), 4 states have call predecessors, (69), 2 states have call successors, (69) Word has length 553 [2021-11-12 22:58:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:51,659 INFO L225 Difference]: With dead ends: 6496 [2021-11-12 22:58:51,659 INFO L226 Difference]: Without dead ends: 4068 [2021-11-12 22:58:51,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1105 GetRequests, 1092 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:58:51,667 INFO L933 BasicCegarLoop]: 2541 mSDtfsCounter, 2 mSDsluCounter, 15242 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17783 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:51,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 17783 Invalid, 31 Unknown, 0 Unchecked, 15.24ms Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 115.22ms Time] [2021-11-12 22:58:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-11-12 22:58:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 4068. [2021-11-12 22:58:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 2407 states have (on average 1.235147486497715) internal successors, (2973), 2464 states have internal predecessors, (2973), 1425 states have call successors, (1425), 227 states have call predecessors, (1425), 235 states have return successors, (1446), 1408 states have call predecessors, (1446), 1425 states have call successors, (1446) [2021-11-12 22:58:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 5844 transitions. [2021-11-12 22:58:52,095 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 5844 transitions. Word has length 553 [2021-11-12 22:58:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:52,095 INFO L470 AbstractCegarLoop]: Abstraction has 4068 states and 5844 transitions. [2021-11-12 22:58:52,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 6 states have internal predecessors, (237), 2 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (69), 4 states have call predecessors, (69), 2 states have call successors, (69) [2021-11-12 22:58:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 5844 transitions. [2021-11-12 22:58:52,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-11-12 22:58:52,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:52,104 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 21, 21, 21, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:52,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:52,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:58:52,305 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:52,306 INFO L85 PathProgramCache]: Analyzing trace with hash -463289480, now seen corresponding path program 1 times [2021-11-12 22:58:52,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:52,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871116047] [2021-11-12 22:58:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:58:52,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:52,313 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:52,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:58:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:58:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 3578 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:58:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 627 proven. 3 refuted. 0 times theorem prover too weak. 4280 trivial. 0 not checked. [2021-11-12 22:59:01,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 4844 trivial. 0 not checked. [2021-11-12 22:59:04,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:59:04,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871116047] [2021-11-12 22:59:04,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871116047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:59:04,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1778993349] [2021-11-12 22:59:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:59:04,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:59:04,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:59:04,663 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:59:04,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 22:59:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:59:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 3578 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:59:07,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4910 trivial. 0 not checked. [2021-11-12 22:59:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4910 trivial. 0 not checked. [2021-11-12 22:59:09,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1778993349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:59:09,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:59:09,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [10, 9] total 19 [2021-11-12 22:59:09,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797958103] [2021-11-12 22:59:09,804 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:59:09,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:59:09,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:59:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:59:09,806 INFO L87 Difference]: Start difference. First operand 4068 states and 5844 transitions. Second operand has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 3 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2021-11-12 22:59:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:10,232 INFO L93 Difference]: Finished difference Result 8085 states and 11650 transitions. [2021-11-12 22:59:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:59:10,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 3 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) Word has length 750 [2021-11-12 22:59:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:10,235 INFO L225 Difference]: With dead ends: 8085 [2021-11-12 22:59:10,235 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 22:59:10,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2997 GetRequests, 2979 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:59:10,252 INFO L933 BasicCegarLoop]: 2541 mSDtfsCounter, 9 mSDsluCounter, 7610 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10151 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:10,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10151 Invalid, 11 Unknown, 0 Unchecked, 9.24ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 34.93ms Time] [2021-11-12 22:59:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 22:59:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 22:59:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 22:59:10,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2021-11-12 22:59:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:10,257 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 22:59:10,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 3 states have call successors, (80), 3 states have call predecessors, (80), 2 states have return successors, (76), 2 states have call predecessors, (76), 2 states have call successors, (76) [2021-11-12 22:59:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 22:59:10,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 22:59:10,259 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 22:59:10,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:10,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-12 22:59:10,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd0eb7c1-f959-4299-a328-bc40bbd70d4f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:59:10,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.