./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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 b45d894549c3d959709f16d175c155effcb8f4008755bf9537dca57ce5b6aecf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:51:20,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:51:20,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:51:20,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:51:20,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:51:20,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:51:20,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:51:20,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:51:20,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:51:20,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:51:20,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:51:20,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:51:20,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:51:20,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:51:20,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:51:20,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:51:20,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:51:20,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:51:20,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:51:20,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:51:20,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:51:20,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:51:20,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:51:20,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:51:20,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:51:20,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:51:20,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:51:20,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:51:20,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:51:20,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:51:20,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:51:20,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:51:20,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:51:20,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:51:20,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:51:20,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:51:20,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:51:20,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:51:20,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:51:20,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:51:20,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:51:20,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:51:20,981 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:51:20,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:51:20,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:51:20,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:51:20,982 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:51:20,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:51:20,983 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:51:20,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:51:20,983 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:51:20,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:51:20,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:51:20,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:51:20,985 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:51:20,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:51:20,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:51:20,985 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:51:20,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:51:20,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:51:20,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:51:20,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:51:20,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:51:20,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:51:20,988 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:51:20,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:51:20,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:51:20,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:51:20,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:51:20,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:51:20,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:20,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:51:20,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:51:20,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:51:20,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:51:20,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:51:20,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:51:20,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:51:20,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:51:20,998 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b45d894549c3d959709f16d175c155effcb8f4008755bf9537dca57ce5b6aecf [2021-11-12 22:51:21,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:51:21,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:51:21,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:51:21,317 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:51:21,318 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:51:21,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-12 22:51:21,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/ea47b8b5b/d5e21a77bb9c469f8bc49bfe72af450a/FLAG263a9fde5 [2021-11-12 22:51:22,392 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:51:22,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-12 22:51:22,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/ea47b8b5b/d5e21a77bb9c469f8bc49bfe72af450a/FLAG263a9fde5 [2021-11-12 22:51:22,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/ea47b8b5b/d5e21a77bb9c469f8bc49bfe72af450a [2021-11-12 22:51:22,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:51:22,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:51:22,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:22,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:51:22,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:51:22,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:22" (1/1) ... [2021-11-12 22:51:22,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa0b7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:22, skipping insertion in model container [2021-11-12 22:51:22,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:22" (1/1) ... [2021-11-12 22:51:22,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:51:23,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:24,618 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:51:24,820 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:51:24,821 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:51:24,825 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:51:24,925 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i[237426,237439] [2021-11-12 22:51:24,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:24,996 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 22:51:24,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54f4096e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:24, skipping insertion in model container [2021-11-12 22:51:24,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:24,997 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:51:24,999 INFO L158 Benchmark]: Toolchain (without parser) took 2133.06ms. Allocated memory is still 134.2MB. Free memory was 107.7MB in the beginning and 71.1MB in the end (delta: 36.6MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. [2021-11-12 22:51:24,999 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 64.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:51:25,000 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2130.74ms. Allocated memory is still 134.2MB. Free memory was 107.1MB in the beginning and 71.1MB in the end (delta: 36.0MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. [2021-11-12 22:51:25,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 86.0MB. Free memory is still 64.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2130.74ms. Allocated memory is still 134.2MB. Free memory was 107.1MB in the beginning and 71.1MB in the end (delta: 36.0MB). Peak memory consumption was 51.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4107]: 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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 b45d894549c3d959709f16d175c155effcb8f4008755bf9537dca57ce5b6aecf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:51:27,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:51:27,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:51:27,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:51:27,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:51:27,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:51:27,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:51:27,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:51:27,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:51:27,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:51:27,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:51:27,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:51:27,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:51:27,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:51:27,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:51:27,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:51:27,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:51:27,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:51:27,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:51:27,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:51:27,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:51:27,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:51:27,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:51:27,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:51:27,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:51:27,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:51:27,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:51:27,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:51:27,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:51:27,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:51:27,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:51:27,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:51:27,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:51:27,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:51:27,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:51:27,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:51:27,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:51:27,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:51:27,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:51:27,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:51:27,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:51:27,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:51:27,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:51:27,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:51:27,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:51:27,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:51:27,315 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:51:27,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:51:27,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:51:27,316 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:51:27,316 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:51:27,316 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:51:27,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:51:27,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:51:27,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:51:27,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:51:27,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:51:27,318 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:51:27,318 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:51:27,318 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:51:27,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:51:27,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:51:27,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:51:27,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:51:27,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:51:27,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:51:27,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:27,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:51:27,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:51:27,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:51:27,321 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:51:27,321 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:27,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:51:27,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:51:27,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:51:27,322 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b45d894549c3d959709f16d175c155effcb8f4008755bf9537dca57ce5b6aecf [2021-11-12 22:51:27,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:51:27,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:51:27,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:51:27,733 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:51:27,736 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:51:27,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-12 22:51:27,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/167650a73/b917116125e348d2a2fb4fe0eceb9c33/FLAG2c034f1b9 [2021-11-12 22:51:28,674 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:51:28,675 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-12 22:51:28,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/167650a73/b917116125e348d2a2fb4fe0eceb9c33/FLAG2c034f1b9 [2021-11-12 22:51:29,137 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/data/167650a73/b917116125e348d2a2fb4fe0eceb9c33 [2021-11-12 22:51:29,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:51:29,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:51:29,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:29,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:51:29,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:51:29,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:29" (1/1) ... [2021-11-12 22:51:29,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9c81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:29, skipping insertion in model container [2021-11-12 22:51:29,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:51:29" (1/1) ... [2021-11-12 22:51:29,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:51:29,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:31,201 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i[237426,237439] [2021-11-12 22:51:31,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:31,294 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:51:31,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:51:31,682 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i[237426,237439] [2021-11-12 22:51:31,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:31,749 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:51:32,106 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_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i[237426,237439] [2021-11-12 22:51:32,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:51:32,359 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:51:32,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32 WrapperNode [2021-11-12 22:51:32,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:51:32,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:51:32,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:51:32,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:51:32,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:32,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:32,697 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:51:32,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:51:32,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:51:32,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:51:32,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:32,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:32,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:32,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:33,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:33,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:33,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:33,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:51:33,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:51:33,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:51:33,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:51:33,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (1/1) ... [2021-11-12 22:51:33,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:51:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:33,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:51:33,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:51:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:51:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure __kuid_val [2021-11-12 22:51:33,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __kuid_val [2021-11-12 22:51:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:51:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure loop_add [2021-11-12 22:51:33,252 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_add [2021-11-12 22:51:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:51:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:51:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:51:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:51:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:51:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:51:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure iov_iter_bvec [2021-11-12 22:51:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_iter_bvec [2021-11-12 22:51:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:51:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:51:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2021-11-12 22:51:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2021-11-12 22:51:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure loop_control_ioctl [2021-11-12 22:51:33,254 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_control_ioctl [2021-11-12 22:51:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-12 22:51:33,254 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-12 22:51:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 22:51:33,254 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 22:51:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:51:33,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:51:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure kobject_uevent [2021-11-12 22:51:33,255 INFO L138 BoogieDeclarations]: Found implementation of procedure kobject_uevent [2021-11-12 22:51:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-12 22:51:33,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-12 22:51:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure loop_remove [2021-11-12 22:51:33,256 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_remove [2021-11-12 22:51:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure transfer_xor [2021-11-12 22:51:33,256 INFO L138 BoogieDeclarations]: Found implementation of procedure transfer_xor [2021-11-12 22:51:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 22:51:33,257 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 22:51:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:51:33,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:51:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure huge_encode_dev [2021-11-12 22:51:33,257 INFO L138 BoogieDeclarations]: Found implementation of procedure huge_encode_dev [2021-11-12 22:51:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure lo_do_transfer [2021-11-12 22:51:33,257 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_do_transfer [2021-11-12 22:51:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_unfreeze_queue [2021-11-12 22:51:33,258 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_unfreeze_queue [2021-11-12 22:51:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_2 [2021-11-12 22:51:33,258 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_2 [2021-11-12 22:51:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure lo_compat_ioctl [2021-11-12 22:51:33,259 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_compat_ioctl [2021-11-12 22:51:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2021-11-12 22:51:33,259 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2021-11-12 22:51:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-12 22:51:33,260 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-12 22:51:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:51:33,261 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:51:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:51:33,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:51:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR_OR_NULL [2021-11-12 22:51:33,262 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR_OR_NULL [2021-11-12 22:51:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure loop_get_status [2021-11-12 22:51:33,263 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_get_status [2021-11-12 22:51:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure loop_handle_cmd [2021-11-12 22:51:33,263 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_handle_cmd [2021-11-12 22:51:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure loop_clr_fd [2021-11-12 22:51:33,263 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_clr_fd [2021-11-12 22:51:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:51:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 22:51:33,264 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 22:51:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure figure_loop_size [2021-11-12 22:51:33,264 INFO L138 BoogieDeclarations]: Found implementation of procedure figure_loop_size [2021-11-12 22:51:33,265 INFO L130 BoogieDeclarations]: Found specification of procedure get_size [2021-11-12 22:51:33,265 INFO L138 BoogieDeclarations]: Found implementation of procedure get_size [2021-11-12 22:51:33,265 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_rq_to_pdu [2021-11-12 22:51:33,265 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_rq_to_pdu [2021-11-12 22:51:33,265 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-12 22:51:33,265 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-12 22:51:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:51:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-12 22:51:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_2 [2021-11-12 22:51:33,266 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_2 [2021-11-12 22:51:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-12 22:51:33,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-12 22:51:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure lo_write_bvec [2021-11-12 22:51:33,267 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_write_bvec [2021-11-12 22:51:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:51:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:51:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:51:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:51:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:51:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:51:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:51:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:51:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-12 22:51:33,269 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-12 22:51:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:51:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:51:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-12 22:51:33,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-12 22:51:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-12 22:51:33,271 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-12 22:51:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_status_old [2021-11-12 22:51:33,271 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_status_old [2021-11-12 22:51:33,272 INFO L130 BoogieDeclarations]: Found specification of procedure fput [2021-11-12 22:51:33,272 INFO L138 BoogieDeclarations]: Found implementation of procedure fput [2021-11-12 22:51:33,272 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 22:51:33,272 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 22:51:33,272 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-12 22:51:33,272 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-12 22:51:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure loop_reread_partitions [2021-11-12 22:51:33,273 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_reread_partitions [2021-11-12 22:51:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure nonseekable_open [2021-11-12 22:51:33,273 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_capacity [2021-11-12 22:51:33,273 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_capacity [2021-11-12 22:51:33,274 INFO L130 BoogieDeclarations]: Found specification of procedure vfs_iter_read [2021-11-12 22:51:33,275 INFO L138 BoogieDeclarations]: Found implementation of procedure vfs_iter_read [2021-11-12 22:51:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure idr_for_each [2021-11-12 22:51:33,277 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_for_each [2021-11-12 22:51:33,277 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_free_tag_set [2021-11-12 22:51:33,277 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_free_tag_set [2021-11-12 22:51:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure ___might_sleep [2021-11-12 22:51:33,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ___might_sleep [2021-11-12 22:51:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-11-12 22:51:33,280 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-11-12 22:51:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-12 22:51:33,290 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-12 22:51:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure bio_advance_iter [2021-11-12 22:51:33,291 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_advance_iter [2021-11-12 22:51:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure loop_queue_write_work [2021-11-12 22:51:33,291 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_queue_write_work [2021-11-12 22:51:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure bd_set_size [2021-11-12 22:51:33,291 INFO L138 BoogieDeclarations]: Found implementation of procedure bd_set_size [2021-11-12 22:51:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure fget [2021-11-12 22:51:33,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fget [2021-11-12 22:51:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure mapping_set_gfp_mask [2021-11-12 22:51:33,292 INFO L138 BoogieDeclarations]: Found implementation of procedure mapping_set_gfp_mask [2021-11-12 22:51:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure xor_init [2021-11-12 22:51:33,292 INFO L138 BoogieDeclarations]: Found implementation of procedure xor_init [2021-11-12 22:51:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_status64 [2021-11-12 22:51:33,292 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_status64 [2021-11-12 22:51:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:51:33,293 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:51:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_11 [2021-11-12 22:51:33,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_11 [2021-11-12 22:51:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure zero_fill_bio [2021-11-12 22:51:33,293 INFO L138 BoogieDeclarations]: Found implementation of procedure zero_fill_bio [2021-11-12 22:51:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 22:51:33,293 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 22:51:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure loop_attr_show [2021-11-12 22:51:33,294 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_attr_show [2021-11-12 22:51:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 22:51:33,294 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 22:51:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:51:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:51:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:51:33,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:51:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:51:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:51:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-12 22:51:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-12 22:51:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-12 22:51:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-12 22:51:33,295 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_freeze_queue [2021-11-12 22:51:33,295 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_freeze_queue [2021-11-12 22:51:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 22:51:33,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 22:51:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:51:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 22:51:33,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 22:51:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 22:51:33,296 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 22:51:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure get_loop_size [2021-11-12 22:51:33,297 INFO L138 BoogieDeclarations]: Found implementation of procedure get_loop_size [2021-11-12 22:51:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:51:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure blk_cleanup_queue [2021-11-12 22:51:33,297 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_cleanup_queue [2021-11-12 22:51:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_status [2021-11-12 22:51:33,297 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_status [2021-11-12 22:51:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 22:51:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:51:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure lo_ioctl [2021-11-12 22:51:33,298 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_ioctl [2021-11-12 22:51:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:51:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:51:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-12 22:51:33,298 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-12 22:51:33,299 INFO L130 BoogieDeclarations]: Found specification of procedure ___ratelimit [2021-11-12 22:51:33,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ___ratelimit [2021-11-12 22:51:33,299 INFO L130 BoogieDeclarations]: Found specification of procedure idr_alloc [2021-11-12 22:51:33,299 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_alloc [2021-11-12 22:51:33,299 INFO L130 BoogieDeclarations]: Found specification of procedure loop_release_xfer [2021-11-12 22:51:33,299 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_release_xfer [2021-11-12 22:51:33,299 INFO L130 BoogieDeclarations]: Found specification of procedure _cond_resched [2021-11-12 22:51:33,299 INFO L138 BoogieDeclarations]: Found implementation of procedure _cond_resched [2021-11-12 22:51:33,300 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-12 22:51:33,300 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-12 22:51:33,300 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_2 [2021-11-12 22:51:33,300 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_2 [2021-11-12 22:51:33,300 INFO L130 BoogieDeclarations]: Found specification of procedure loop_switch [2021-11-12 22:51:33,300 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_switch [2021-11-12 22:51:33,300 INFO L130 BoogieDeclarations]: Found specification of procedure loop_queue_read_work [2021-11-12 22:51:33,301 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_queue_read_work [2021-11-12 22:51:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2021-11-12 22:51:33,301 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2021-11-12 22:51:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-12 22:51:33,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-12 22:51:33,301 INFO L130 BoogieDeclarations]: Found specification of procedure mapping_gfp_mask [2021-11-12 22:51:33,301 INFO L138 BoogieDeclarations]: Found implementation of procedure mapping_gfp_mask [2021-11-12 22:51:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-12 22:51:33,302 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-12 22:51:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2021-11-12 22:51:33,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2021-11-12 22:51:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:51:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-12 22:51:33,302 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-12 22:51:33,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:51:33,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:51:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure loop_lookup [2021-11-12 22:51:33,303 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_lookup [2021-11-12 22:51:33,303 INFO L130 BoogieDeclarations]: Found specification of procedure loop_queue_rq [2021-11-12 22:51:33,303 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_queue_rq [2021-11-12 22:51:40,686 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:52:42,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:52:42,081 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:52:42,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:42 BoogieIcfgContainer [2021-11-12 22:52:42,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:52:42,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:52:42,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:52:42,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:52:42,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:51:29" (1/3) ... [2021-11-12 22:52:42,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2b058a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:42, skipping insertion in model container [2021-11-12 22:52:42,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:51:32" (2/3) ... [2021-11-12 22:52:42,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2b058a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:42, skipping insertion in model container [2021-11-12 22:52:42,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:42" (3/3) ... [2021-11-12 22:52:42,095 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-12 22:52:42,100 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:52:42,100 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:52:42,155 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:52:42,162 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 22:52:42,162 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:52:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 1660 states, 1206 states have (on average 1.3548922056384742) internal successors, (1634), 1241 states have internal predecessors, (1634), 360 states have call successors, (360), 93 states have call predecessors, (360), 92 states have return successors, (347), 345 states have call predecessors, (347), 347 states have call successors, (347) [2021-11-12 22:52:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-11-12 22:52:42,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:42,275 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:42,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1280360256, now seen corresponding path program 1 times [2021-11-12 22:52:42,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:42,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730151993] [2021-11-12 22:52:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:42,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:42,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:42,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:52:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:45,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:52:45,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6141 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 6026 trivial. 0 not checked. [2021-11-12 22:52:47,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6141 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 6026 trivial. 0 not checked. [2021-11-12 22:52:49,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:49,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730151993] [2021-11-12 22:52:49,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730151993] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:49,084 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:49,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:52:49,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825263964] [2021-11-12 22:52:49,086 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:49,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:52:49,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:52:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:49,147 INFO L87 Difference]: Start difference. First operand has 1660 states, 1206 states have (on average 1.3548922056384742) internal successors, (1634), 1241 states have internal predecessors, (1634), 360 states have call successors, (360), 93 states have call predecessors, (360), 92 states have return successors, (347), 345 states have call predecessors, (347), 347 states have call successors, (347) Second operand has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-12 22:52:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:49,417 INFO L93 Difference]: Finished difference Result 3315 states and 4772 transitions. [2021-11-12 22:52:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:52:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 677 [2021-11-12 22:52:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:49,458 INFO L225 Difference]: With dead ends: 3315 [2021-11-12 22:52:49,459 INFO L226 Difference]: Without dead ends: 1640 [2021-11-12 22:52:49,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1352 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:49,479 INFO L933 BasicCegarLoop]: 2336 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 24.08ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:52:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-12 22:52:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2021-11-12 22:52:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1201 states have (on average 1.3430474604496254) internal successors, (1613), 1221 states have internal predecessors, (1613), 347 states have call successors, (347), 92 states have call predecessors, (347), 91 states have return successors, (345), 343 states have call predecessors, (345), 345 states have call successors, (345) [2021-11-12 22:52:49,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2305 transitions. [2021-11-12 22:52:49,671 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2305 transitions. Word has length 677 [2021-11-12 22:52:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 2305 transitions. [2021-11-12 22:52:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (79), 2 states have call predecessors, (79), 2 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2021-11-12 22:52:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2305 transitions. [2021-11-12 22:52:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 678 [2021-11-12 22:52:49,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:49,707 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:49,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:49,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:49,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 403605136, now seen corresponding path program 1 times [2021-11-12 22:52:49,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:49,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802222325] [2021-11-12 22:52:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:49,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:49,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:49,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:52:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:52:53,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6141 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 5943 trivial. 0 not checked. [2021-11-12 22:52:55,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6141 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 5987 trivial. 0 not checked. [2021-11-12 22:52:57,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:57,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802222325] [2021-11-12 22:52:57,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802222325] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:57,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:52:57,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 22:52:57,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917798810] [2021-11-12 22:52:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:57,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:52:57,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:52:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:52:57,397 INFO L87 Difference]: Start difference. First operand 1640 states and 2305 transitions. Second operand has 6 states, 5 states have (on average 20.6) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-12 22:52:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:58,693 INFO L93 Difference]: Finished difference Result 3234 states and 4582 transitions. [2021-11-12 22:52:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:52:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 677 [2021-11-12 22:52:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:58,714 INFO L225 Difference]: With dead ends: 3234 [2021-11-12 22:52:58,714 INFO L226 Difference]: Without dead ends: 1641 [2021-11-12 22:52:58,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1354 GetRequests, 1345 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:52:58,730 INFO L933 BasicCegarLoop]: 2279 mSDtfsCounter, 6 mSDsluCounter, 9056 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 932.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11335 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.99ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1023.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:58,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11335 Invalid, 215 Unknown, 0 Unchecked, 46.99ms Time], IncrementalHoareTripleChecker [30 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 1023.58ms Time] [2021-11-12 22:52:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-12 22:52:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-12 22:52:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1202 states have (on average 1.3427620632279533) internal successors, (1614), 1222 states have internal predecessors, (1614), 347 states have call successors, (347), 92 states have call predecessors, (347), 91 states have return successors, (345), 343 states have call predecessors, (345), 345 states have call successors, (345) [2021-11-12 22:52:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2306 transitions. [2021-11-12 22:52:58,826 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2306 transitions. Word has length 677 [2021-11-12 22:52:58,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:58,833 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2306 transitions. [2021-11-12 22:52:58,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (54), 2 states have call predecessors, (54), 4 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2021-11-12 22:52:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2306 transitions. [2021-11-12 22:52:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-11-12 22:52:58,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:58,844 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:58,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:59,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:59,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:59,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2098898611, now seen corresponding path program 1 times [2021-11-12 22:52:59,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:59,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113918228] [2021-11-12 22:52:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:59,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:59,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:53:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 6658 trivial. 0 not checked. [2021-11-12 22:53:04,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 6702 trivial. 0 not checked. [2021-11-12 22:53:06,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:06,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113918228] [2021-11-12 22:53:06,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113918228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:06,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1350538567] [2021-11-12 22:53:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:06,785 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:06,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:06,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:53:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:08,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6923 trivial. 0 not checked. [2021-11-12 22:53:13,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6923 trivial. 0 not checked. [2021-11-12 22:53:15,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1350538567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:15,838 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:15,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:53:15,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148233643] [2021-11-12 22:53:15,840 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:15,900 INFO L87 Difference]: Start difference. First operand 1641 states and 2306 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (105), 3 states have call predecessors, (105), 3 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2021-11-12 22:53:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:16,024 INFO L93 Difference]: Finished difference Result 3178 states and 4461 transitions. [2021-11-12 22:53:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (105), 3 states have call predecessors, (105), 3 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) Word has length 700 [2021-11-12 22:53:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:16,043 INFO L225 Difference]: With dead ends: 3178 [2021-11-12 22:53:16,044 INFO L226 Difference]: Without dead ends: 1641 [2021-11-12 22:53:16,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2796 GetRequests, 2786 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:16,054 INFO L933 BasicCegarLoop]: 2299 mSDtfsCounter, 2120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2120 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.98ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.02ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:16,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2120 Valid, 2299 Invalid, 5 Unknown, 0 Unchecked, 12.98ms Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 20.02ms Time] [2021-11-12 22:53:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-12 22:53:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1641. [2021-11-12 22:53:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1202 states have (on average 1.3402662229617304) internal successors, (1611), 1222 states have internal predecessors, (1611), 347 states have call successors, (347), 92 states have call predecessors, (347), 91 states have return successors, (345), 343 states have call predecessors, (345), 345 states have call successors, (345) [2021-11-12 22:53:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2303 transitions. [2021-11-12 22:53:16,141 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2303 transitions. Word has length 700 [2021-11-12 22:53:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:16,144 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 2303 transitions. [2021-11-12 22:53:16,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (105), 3 states have call predecessors, (105), 3 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2021-11-12 22:53:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2303 transitions. [2021-11-12 22:53:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2021-11-12 22:53:16,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:16,155 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:16,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:16,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:16,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:16,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:16,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1773366859, now seen corresponding path program 1 times [2021-11-12 22:53:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:16,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603766217] [2021-11-12 22:53:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:16,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:16,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:16,587 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:16,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:53:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 6658 trivial. 0 not checked. [2021-11-12 22:53:21,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 6702 trivial. 0 not checked. [2021-11-12 22:53:23,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:23,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603766217] [2021-11-12 22:53:23,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603766217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:23,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906982987] [2021-11-12 22:53:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:23,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:23,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 22:53:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6923 trivial. 0 not checked. [2021-11-12 22:53:30,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6923 trivial. 0 not checked. [2021-11-12 22:53:32,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1906982987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:32,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:32,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:53:32,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711252745] [2021-11-12 22:53:32,443 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:32,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:32,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:32,446 INFO L87 Difference]: Start difference. First operand 1641 states and 2303 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-12 22:53:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:32,659 INFO L93 Difference]: Finished difference Result 4713 states and 6637 transitions. [2021-11-12 22:53:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 700 [2021-11-12 22:53:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:32,691 INFO L225 Difference]: With dead ends: 4713 [2021-11-12 22:53:32,692 INFO L226 Difference]: Without dead ends: 3163 [2021-11-12 22:53:32,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2796 GetRequests, 2786 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:32,704 INFO L933 BasicCegarLoop]: 2838 mSDtfsCounter, 2096 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2096 SdHoareTripleChecker+Valid, 4995 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.99ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.74ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:32,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2096 Valid, 4995 Invalid, 10 Unknown, 0 Unchecked, 16.99ms Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 38.74ms Time] [2021-11-12 22:53:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-11-12 22:53:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3160. [2021-11-12 22:53:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 2336 states have (on average 1.34888698630137) internal successors, (3151), 2375 states have internal predecessors, (3151), 642 states have call successors, (642), 182 states have call predecessors, (642), 181 states have return successors, (652), 636 states have call predecessors, (652), 640 states have call successors, (652) [2021-11-12 22:53:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4445 transitions. [2021-11-12 22:53:32,924 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 4445 transitions. Word has length 700 [2021-11-12 22:53:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:32,927 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 4445 transitions. [2021-11-12 22:53:32,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2021-11-12 22:53:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 4445 transitions. [2021-11-12 22:53:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2021-11-12 22:53:32,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:32,940 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:33,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:33,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:33,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:33,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:33,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2004754788, now seen corresponding path program 1 times [2021-11-12 22:53:33,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:33,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048734666] [2021-11-12 22:53:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:33,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:33,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:33,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:53:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 264 proven. 1 refuted. 0 times theorem prover too weak. 6658 trivial. 0 not checked. [2021-11-12 22:53:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 6702 trivial. 0 not checked. [2021-11-12 22:53:40,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:40,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048734666] [2021-11-12 22:53:40,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048734666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:40,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1854329474] [2021-11-12 22:53:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:40,857 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:40,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:40,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:40,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:53:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 3143 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6923 trivial. 0 not checked. [2021-11-12 22:53:43,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6923 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6923 trivial. 0 not checked. [2021-11-12 22:53:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1854329474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:44,844 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:53:44,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992289935] [2021-11-12 22:53:44,846 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:44,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:44,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:44,848 INFO L87 Difference]: Start difference. First operand 3160 states and 4445 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-12 22:53:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:45,398 INFO L93 Difference]: Finished difference Result 7957 states and 11137 transitions. [2021-11-12 22:53:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:53:45,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 712 [2021-11-12 22:53:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:45,441 INFO L225 Difference]: With dead ends: 7957 [2021-11-12 22:53:45,442 INFO L226 Difference]: Without dead ends: 4901 [2021-11-12 22:53:45,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2844 GetRequests, 2834 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:45,461 INFO L933 BasicCegarLoop]: 2472 mSDtfsCounter, 1344 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 295.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 4602 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.48ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 342.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:45,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1344 Valid, 4602 Invalid, 23 Unknown, 0 Unchecked, 13.48ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 342.77ms Time] [2021-11-12 22:53:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-11-12 22:53:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 4893. [2021-11-12 22:53:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 3648 states have (on average 1.3508771929824561) internal successors, (4928), 3700 states have internal predecessors, (4928), 948 states have call successors, (948), 297 states have call predecessors, (948), 296 states have return successors, (958), 939 states have call predecessors, (958), 946 states have call successors, (958) [2021-11-12 22:53:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 6834 transitions. [2021-11-12 22:53:45,743 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 6834 transitions. Word has length 712 [2021-11-12 22:53:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:45,745 INFO L470 AbstractCegarLoop]: Abstraction has 4893 states and 6834 transitions. [2021-11-12 22:53:45,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2021-11-12 22:53:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 6834 transitions. [2021-11-12 22:53:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-11-12 22:53:45,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:45,763 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:53:45,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:46,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:46,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:46,183 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1525807744, now seen corresponding path program 1 times [2021-11-12 22:53:46,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:46,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166969386] [2021-11-12 22:53:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:46,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:46,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:46,190 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:46,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:53:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:53:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6753 trivial. 0 not checked. [2021-11-12 22:53:52,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8141 trivial. 0 not checked. [2021-11-12 22:53:54,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:54,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166969386] [2021-11-12 22:53:54,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166969386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:54,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452362557] [2021-11-12 22:53:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:54,581 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:54,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:54,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:53:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:53:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 7623 trivial. 0 not checked. [2021-11-12 22:53:57,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8351 trivial. 0 not checked. [2021-11-12 22:53:59,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1452362557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:53:59,335 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:53:59,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:53:59,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536293169] [2021-11-12 22:53:59,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:53:59,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:53:59,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:53:59,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:53:59,341 INFO L87 Difference]: Start difference. First operand 4893 states and 6834 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (67), 3 states have call predecessors, (67), 3 states have return successors, (64), 3 states have call predecessors, (64), 3 states have call successors, (64) [2021-11-12 22:54:01,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:02,100 INFO L93 Difference]: Finished difference Result 12647 states and 17672 transitions. [2021-11-12 22:54:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:54:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (67), 3 states have call predecessors, (67), 3 states have return successors, (64), 3 states have call predecessors, (64), 3 states have call successors, (64) Word has length 801 [2021-11-12 22:54:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:02,165 INFO L225 Difference]: With dead ends: 12647 [2021-11-12 22:54:02,166 INFO L226 Difference]: Without dead ends: 7863 [2021-11-12 22:54:02,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3200 GetRequests, 3190 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:54:02,195 INFO L933 BasicCegarLoop]: 3661 mSDtfsCounter, 2064 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2389.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 5917 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.54ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2462.51ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:02,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2064 Valid, 5917 Invalid, 35 Unknown, 0 Unchecked, 14.54ms Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 1 Unknown, 0 Unchecked, 2462.51ms Time] [2021-11-12 22:54:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7863 states. [2021-11-12 22:54:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7863 to 7853. [2021-11-12 22:54:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 5860 states have (on average 1.3517064846416382) internal successors, (7921), 5949 states have internal predecessors, (7921), 1516 states have call successors, (1516), 477 states have call predecessors, (1516), 476 states have return successors, (1534), 1502 states have call predecessors, (1534), 1514 states have call successors, (1534) [2021-11-12 22:54:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 10971 transitions. [2021-11-12 22:54:02,647 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 10971 transitions. Word has length 801 [2021-11-12 22:54:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:02,649 INFO L470 AbstractCegarLoop]: Abstraction has 7853 states and 10971 transitions. [2021-11-12 22:54:02,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (67), 3 states have call predecessors, (67), 3 states have return successors, (64), 3 states have call predecessors, (64), 3 states have call successors, (64) [2021-11-12 22:54:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 10971 transitions. [2021-11-12 22:54:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2021-11-12 22:54:02,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:02,667 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:54:02,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:02,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:03,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:54:03,091 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1492099200, now seen corresponding path program 1 times [2021-11-12 22:54:03,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:03,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148076804] [2021-11-12 22:54:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:03,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:03,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:03,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:03,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:54:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:06,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 3381 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:54:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6753 trivial. 0 not checked. [2021-11-12 22:54:09,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8141 trivial. 0 not checked. [2021-11-12 22:54:11,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:11,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148076804] [2021-11-12 22:54:11,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148076804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:11,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1215734801] [2021-11-12 22:54:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:11,371 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:11,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:11,372 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:11,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:54:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 3381 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:54:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8362 trivial. 0 not checked. [2021-11-12 22:54:14,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8362 trivial. 0 not checked. [2021-11-12 22:54:16,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1215734801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:16,411 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:54:16,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [7, 7] total 17 [2021-11-12 22:54:16,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848394398] [2021-11-12 22:54:16,412 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:16,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:54:16,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:54:16,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:54:16,414 INFO L87 Difference]: Start difference. First operand 7853 states and 10971 transitions. Second operand has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 4 states have call successors, (62), 4 states have call predecessors, (62), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-12 22:54:18,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:20,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:22,534 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 22:54:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:29,287 INFO L93 Difference]: Finished difference Result 19442 states and 27181 transitions. [2021-11-12 22:54:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:54:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 4 states have call successors, (62), 4 states have call predecessors, (62), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 800 [2021-11-12 22:54:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:29,382 INFO L225 Difference]: With dead ends: 19442 [2021-11-12 22:54:29,382 INFO L226 Difference]: Without dead ends: 15551 [2021-11-12 22:54:29,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3201 GetRequests, 3181 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:54:29,402 INFO L933 BasicCegarLoop]: 4250 mSDtfsCounter, 2283 mSDsluCounter, 20815 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10873.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 25065 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.62ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11521.50ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:29,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2299 Valid, 25065 Invalid, 782 Unknown, 0 Unchecked, 58.62ms Time], IncrementalHoareTripleChecker [38 Valid, 741 Invalid, 3 Unknown, 0 Unchecked, 11521.50ms Time] [2021-11-12 22:54:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15551 states. [2021-11-12 22:54:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15551 to 15505. [2021-11-12 22:54:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15505 states, 11582 states have (on average 1.3525297876014506) internal successors, (15665), 11760 states have internal predecessors, (15665), 2964 states have call successors, (2964), 955 states have call predecessors, (2964), 958 states have return successors, (3022), 2937 states have call predecessors, (3022), 2962 states have call successors, (3022) [2021-11-12 22:54:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15505 states to 15505 states and 21651 transitions. [2021-11-12 22:54:30,357 INFO L78 Accepts]: Start accepts. Automaton has 15505 states and 21651 transitions. Word has length 800 [2021-11-12 22:54:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:54:30,359 INFO L470 AbstractCegarLoop]: Abstraction has 15505 states and 21651 transitions. [2021-11-12 22:54:30,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 4 states have call successors, (62), 4 states have call predecessors, (62), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-12 22:54:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 15505 states and 21651 transitions. [2021-11-12 22:54:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2021-11-12 22:54:30,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:54:30,379 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:54:30,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:54:30,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-11-12 22:54:30,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:30,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:54:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:54:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1710953918, now seen corresponding path program 1 times [2021-11-12 22:54:30,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:54:30,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402657224] [2021-11-12 22:54:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:30,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:54:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:54:30,800 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:54:30,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:54:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:54:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6753 trivial. 0 not checked. [2021-11-12 22:54:36,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8141 trivial. 0 not checked. [2021-11-12 22:54:39,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:54:39,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402657224] [2021-11-12 22:54:39,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402657224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:39,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168161128] [2021-11-12 22:54:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:39,387 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:54:39,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:54:39,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:54:39,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 22:54:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:43,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:54:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6753 trivial. 0 not checked. [2021-11-12 22:54:46,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8141 trivial. 0 not checked. [2021-11-12 22:54:48,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [168161128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:54:48,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224414652] [2021-11-12 22:54:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:54:48,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:54:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:54:48,241 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:54:48,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-12 22:54:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:54:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:54:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:54:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 7623 trivial. 0 not checked. [2021-11-12 22:54:51,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:54:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8351 trivial. 0 not checked. [2021-11-12 22:54:52,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224414652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:54:52,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:54:52,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7, 7, 7] total 15 [2021-11-12 22:54:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940269918] [2021-11-12 22:54:52,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:54:52,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:54:52,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:54:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:54:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:54:52,700 INFO L87 Difference]: Start difference. First operand 15505 states and 21651 transitions. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-12 22:54:54,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:54:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:54:59,341 INFO L93 Difference]: Finished difference Result 46290 states and 64613 transitions. [2021-11-12 22:54:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:54:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 800 [2021-11-12 22:54:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:54:59,501 INFO L225 Difference]: With dead ends: 46290 [2021-11-12 22:54:59,502 INFO L226 Difference]: Without dead ends: 30876 [2021-11-12 22:54:59,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4796 GetRequests, 4781 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:54:59,564 INFO L933 BasicCegarLoop]: 4438 mSDtfsCounter, 2146 mSDsluCounter, 15000 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5156.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2146 SdHoareTripleChecker+Valid, 19438 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5528.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:54:59,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2146 Valid, 19438 Invalid, 625 Unknown, 0 Unchecked, 30.85ms Time], IncrementalHoareTripleChecker [3 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 5528.46ms Time] [2021-11-12 22:54:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30876 states. [2021-11-12 22:55:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30876 to 28154. [2021-11-12 22:55:01,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28154 states, 21022 states have (on average 1.35410522309961) internal successors, (28466), 21367 states have internal predecessors, (28466), 5397 states have call successors, (5397), 1727 states have call predecessors, (5397), 1734 states have return successors, (5515), 5340 states have call predecessors, (5515), 5395 states have call successors, (5515) [2021-11-12 22:55:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28154 states to 28154 states and 39378 transitions. [2021-11-12 22:55:01,153 INFO L78 Accepts]: Start accepts. Automaton has 28154 states and 39378 transitions. Word has length 800 [2021-11-12 22:55:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:01,154 INFO L470 AbstractCegarLoop]: Abstraction has 28154 states and 39378 transitions. [2021-11-12 22:55:01,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-12 22:55:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 28154 states and 39378 transitions. [2021-11-12 22:55:01,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2021-11-12 22:55:01,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:01,178 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:55:01,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:01,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:01,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-12 22:55:01,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:55:01,792 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:01,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:01,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1419432798, now seen corresponding path program 1 times [2021-11-12 22:55:01,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:01,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425610717] [2021-11-12 22:55:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:01,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:01,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:01,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:01,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:55:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:05,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 3403 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:55:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6753 trivial. 0 not checked. [2021-11-12 22:55:08,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8141 trivial. 0 not checked. [2021-11-12 22:55:10,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:10,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425610717] [2021-11-12 22:55:10,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425610717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:10,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1122784536] [2021-11-12 22:55:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:10,380 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:10,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:10,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:10,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:55:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 3403 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:55:12,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 7623 trivial. 0 not checked. [2021-11-12 22:55:13,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8362 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8351 trivial. 0 not checked. [2021-11-12 22:55:15,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1122784536] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:15,354 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:55:15,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-12 22:55:15,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45032596] [2021-11-12 22:55:15,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:15,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:55:15,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:55:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:55:15,358 INFO L87 Difference]: Start difference. First operand 28154 states and 39378 transitions. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 4 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (66), 4 states have call predecessors, (66), 4 states have call successors, (66) [2021-11-12 22:55:17,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:19,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:55:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:24,701 INFO L93 Difference]: Finished difference Result 59077 states and 82496 transitions. [2021-11-12 22:55:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:55:24,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 4 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (66), 4 states have call predecessors, (66), 4 states have call successors, (66) Word has length 809 [2021-11-12 22:55:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:24,878 INFO L225 Difference]: With dead ends: 59077 [2021-11-12 22:55:24,878 INFO L226 Difference]: Without dead ends: 30864 [2021-11-12 22:55:24,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3239 GetRequests, 3217 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:55:24,976 INFO L933 BasicCegarLoop]: 4440 mSDtfsCounter, 2166 mSDsluCounter, 23849 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7301.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2166 SdHoareTripleChecker+Valid, 28289 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.63ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7666.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:24,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2166 Valid, 28289 Invalid, 671 Unknown, 0 Unchecked, 72.63ms Time], IncrementalHoareTripleChecker [11 Valid, 658 Invalid, 2 Unknown, 0 Unchecked, 7666.27ms Time] [2021-11-12 22:55:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30864 states. [2021-11-12 22:55:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30864 to 28052. [2021-11-12 22:55:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28052 states, 20947 states have (on average 1.354322814722872) internal successors, (28369), 21292 states have internal predecessors, (28369), 5381 states have call successors, (5381), 1716 states have call predecessors, (5381), 1723 states have return successors, (5499), 5324 states have call predecessors, (5499), 5379 states have call successors, (5499) [2021-11-12 22:55:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28052 states to 28052 states and 39249 transitions. [2021-11-12 22:55:26,379 INFO L78 Accepts]: Start accepts. Automaton has 28052 states and 39249 transitions. Word has length 809 [2021-11-12 22:55:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:26,380 INFO L470 AbstractCegarLoop]: Abstraction has 28052 states and 39249 transitions. [2021-11-12 22:55:26,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 4 states have call successors, (69), 2 states have call predecessors, (69), 2 states have return successors, (66), 4 states have call predecessors, (66), 4 states have call successors, (66) [2021-11-12 22:55:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28052 states and 39249 transitions. [2021-11-12 22:55:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2021-11-12 22:55:26,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:26,402 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:55:26,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:26,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:26,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:26,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:26,819 INFO L85 PathProgramCache]: Analyzing trace with hash -203079030, now seen corresponding path program 1 times [2021-11-12 22:55:26,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:26,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460503850] [2021-11-12 22:55:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:26,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:26,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:26,823 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:26,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:55:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:30,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 3438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:55:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6756 trivial. 0 not checked. [2021-11-12 22:55:33,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8144 trivial. 0 not checked. [2021-11-12 22:55:35,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:55:35,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460503850] [2021-11-12 22:55:35,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460503850] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:35,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881869069] [2021-11-12 22:55:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:35,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:55:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:55:35,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:55:35,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:55:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 3438 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:55:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6756 trivial. 0 not checked. [2021-11-12 22:55:42,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8144 trivial. 0 not checked. [2021-11-12 22:55:44,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881869069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:55:44,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616788032] [2021-11-12 22:55:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:44,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:55:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:55:44,982 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:55:44,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:55:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:46,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 3438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:55:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:55:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 742 proven. 0 refuted. 0 times theorem prover too weak. 7623 trivial. 0 not checked. [2021-11-12 22:55:48,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:55:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8365 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8354 trivial. 0 not checked. [2021-11-12 22:55:49,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616788032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:55:49,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 22:55:49,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7, 7, 7] total 15 [2021-11-12 22:55:49,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595345654] [2021-11-12 22:55:49,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:55:49,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:55:49,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:55:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:55:49,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:55:49,820 INFO L87 Difference]: Start difference. First operand 28052 states and 39249 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 4 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (68), 4 states have call predecessors, (68), 4 states have call successors, (68) [2021-11-12 22:55:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:55:51,116 INFO L93 Difference]: Finished difference Result 56262 states and 78781 transitions. [2021-11-12 22:55:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:55:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 4 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (68), 4 states have call predecessors, (68), 4 states have call successors, (68) Word has length 819 [2021-11-12 22:55:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:55:51,266 INFO L225 Difference]: With dead ends: 56262 [2021-11-12 22:55:51,266 INFO L226 Difference]: Without dead ends: 28319 [2021-11-12 22:55:51,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4909 GetRequests, 4895 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:55:51,365 INFO L933 BasicCegarLoop]: 2588 mSDtfsCounter, 636 mSDsluCounter, 7300 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 481.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 9888 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.82ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 525.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:55:51,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 9888 Invalid, 157 Unknown, 0 Unchecked, 9.82ms Time], IncrementalHoareTripleChecker [52 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 525.10ms Time] [2021-11-12 22:55:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28319 states. [2021-11-12 22:55:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28319 to 28136. [2021-11-12 22:55:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28136 states, 21010 states have (on average 1.3532603522132318) internal successors, (28432), 21355 states have internal predecessors, (28432), 5402 states have call successors, (5402), 1716 states have call predecessors, (5402), 1723 states have return successors, (5520), 5345 states have call predecessors, (5520), 5400 states have call successors, (5520) [2021-11-12 22:55:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28136 states to 28136 states and 39354 transitions. [2021-11-12 22:55:52,696 INFO L78 Accepts]: Start accepts. Automaton has 28136 states and 39354 transitions. Word has length 819 [2021-11-12 22:55:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:55:52,697 INFO L470 AbstractCegarLoop]: Abstraction has 28136 states and 39354 transitions. [2021-11-12 22:55:52,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 4 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (68), 4 states have call predecessors, (68), 4 states have call successors, (68) [2021-11-12 22:55:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 28136 states and 39354 transitions. [2021-11-12 22:55:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2021-11-12 22:55:52,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:55:52,719 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:52,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:53,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:53,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:55:53,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:55:53,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:55:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:55:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 689955146, now seen corresponding path program 1 times [2021-11-12 22:55:53,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:55:53,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342065682] [2021-11-12 22:55:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:55:53,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:55:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:55:53,342 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:55:53,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:55:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:55:57,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 3600 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:55:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6783 trivial. 0 not checked. [2021-11-12 22:56:00,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8171 trivial. 0 not checked. [2021-11-12 22:56:02,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:02,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342065682] [2021-11-12 22:56:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342065682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:02,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2089339931] [2021-11-12 22:56:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:56:02,652 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:56:02,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:56:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 3600 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:56:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6783 trivial. 0 not checked. [2021-11-12 22:56:09,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8171 trivial. 0 not checked. [2021-11-12 22:56:11,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2089339931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:11,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734660390] [2021-11-12 22:56:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:11,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:56:11,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:56:11,935 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:56:11,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-12 22:56:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 3600 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:56:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8384 trivial. 0 not checked. [2021-11-12 22:56:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8392 trivial. 0 not checked. [2021-11-12 22:56:24,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734660390] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:56:24,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:56:24,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 7, 7, 3] total 15 [2021-11-12 22:56:24,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64989282] [2021-11-12 22:56:24,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:56:24,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:56:24,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:24,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:56:24,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:56:24,430 INFO L87 Difference]: Start difference. First operand 28136 states and 39354 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (64), 4 states have call predecessors, (64), 1 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2021-11-12 22:56:26,552 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:56:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:56:36,916 INFO L93 Difference]: Finished difference Result 55382 states and 78022 transitions. [2021-11-12 22:56:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:56:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (64), 4 states have call predecessors, (64), 1 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) Word has length 853 [2021-11-12 22:56:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:56:37,167 INFO L225 Difference]: With dead ends: 55382 [2021-11-12 22:56:37,175 INFO L226 Difference]: Without dead ends: 55379 [2021-11-12 22:56:37,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5113 GetRequests, 5099 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:56:37,206 INFO L933 BasicCegarLoop]: 4806 mSDtfsCounter, 4341 mSDsluCounter, 3828 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9822.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4341 SdHoareTripleChecker+Valid, 8634 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.15ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10868.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:56:37,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4341 Valid, 8634 Invalid, 1381 Unknown, 0 Unchecked, 30.15ms Time], IncrementalHoareTripleChecker [5 Valid, 1375 Invalid, 1 Unknown, 0 Unchecked, 10868.25ms Time] [2021-11-12 22:56:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55379 states. [2021-11-12 22:56:39,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55379 to 55316. [2021-11-12 22:56:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55316 states, 41318 states have (on average 1.3546638269035287) internal successors, (55972), 42007 states have internal predecessors, (55972), 10610 states have call successors, (10610), 3372 states have call predecessors, (10610), 3387 states have return successors, (11360), 10493 states have call predecessors, (11360), 10608 states have call successors, (11360) [2021-11-12 22:56:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55316 states to 55316 states and 77942 transitions. [2021-11-12 22:56:39,927 INFO L78 Accepts]: Start accepts. Automaton has 55316 states and 77942 transitions. Word has length 853 [2021-11-12 22:56:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:56:39,928 INFO L470 AbstractCegarLoop]: Abstraction has 55316 states and 77942 transitions. [2021-11-12 22:56:39,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (64), 4 states have call predecessors, (64), 1 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2021-11-12 22:56:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 55316 states and 77942 transitions. [2021-11-12 22:56:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2021-11-12 22:56:39,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:56:39,960 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:56:40,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:40,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-12 22:56:40,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:56:40,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:56:40,584 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:56:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:56:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1264283317, now seen corresponding path program 1 times [2021-11-12 22:56:40,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:56:40,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487280885] [2021-11-12 22:56:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:40,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:56:40,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:56:40,589 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:56:40,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:56:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 3657 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:56:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8384 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6775 trivial. 0 not checked. [2021-11-12 22:56:47,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8384 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8163 trivial. 0 not checked. [2021-11-12 22:56:50,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:56:50,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487280885] [2021-11-12 22:56:50,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487280885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:50,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1446961438] [2021-11-12 22:56:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:56:50,735 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:56:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:56:50,736 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:56:50,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:56:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:56:55,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 3657 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:56:55,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8384 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6775 trivial. 0 not checked. [2021-11-12 22:56:58,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8384 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8163 trivial. 0 not checked. [2021-11-12 22:57:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1446961438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:00,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33234508] [2021-11-12 22:57:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:57:00,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:57:00,793 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:57:00,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:57:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:57:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 3657 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:57:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8384 backedges. 1608 proven. 1 refuted. 0 times theorem prover too weak. 6775 trivial. 0 not checked. [2021-11-12 22:57:05,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8384 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 8163 trivial. 0 not checked. [2021-11-12 22:57:07,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33234508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:07,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:57:07,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 22:57:07,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836607448] [2021-11-12 22:57:07,882 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:57:07,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:57:07,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:57:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:57:07,886 INFO L87 Difference]: Start difference. First operand 55316 states and 77942 transitions. Second operand has 11 states, 9 states have (on average 23.88888888888889) internal successors, (215), 11 states have internal predecessors, (215), 4 states have call successors, (108), 2 states have call predecessors, (108), 5 states have return successors, (104), 4 states have call predecessors, (104), 4 states have call successors, (104) [2021-11-12 22:57:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:57:11,569 INFO L93 Difference]: Finished difference Result 110687 states and 156802 transitions. [2021-11-12 22:57:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:57:11,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 23.88888888888889) internal successors, (215), 11 states have internal predecessors, (215), 4 states have call successors, (108), 2 states have call predecessors, (108), 5 states have return successors, (104), 4 states have call predecessors, (104), 4 states have call successors, (104) Word has length 870 [2021-11-12 22:57:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:57:11,958 INFO L225 Difference]: With dead ends: 110687 [2021-11-12 22:57:11,958 INFO L226 Difference]: Without dead ends: 55354 [2021-11-12 22:57:12,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5217 GetRequests, 5205 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:57:12,086 INFO L933 BasicCegarLoop]: 2277 mSDtfsCounter, 8 mSDsluCounter, 20361 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1619.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22638 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.82ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1753.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:57:12,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22638 Invalid, 423 Unknown, 0 Unchecked, 20.82ms Time], IncrementalHoareTripleChecker [52 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 1753.22ms Time] [2021-11-12 22:57:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55354 states. [2021-11-12 22:57:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55354 to 55354. [2021-11-12 22:57:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55354 states, 41354 states have (on average 1.354355080524254) internal successors, (56008), 42043 states have internal predecessors, (56008), 10611 states have call successors, (10611), 3373 states have call predecessors, (10611), 3388 states have return successors, (11361), 10494 states have call predecessors, (11361), 10609 states have call successors, (11361) [2021-11-12 22:57:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55354 states to 55354 states and 77980 transitions. [2021-11-12 22:57:14,700 INFO L78 Accepts]: Start accepts. Automaton has 55354 states and 77980 transitions. Word has length 870 [2021-11-12 22:57:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:57:14,700 INFO L470 AbstractCegarLoop]: Abstraction has 55354 states and 77980 transitions. [2021-11-12 22:57:14,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 23.88888888888889) internal successors, (215), 11 states have internal predecessors, (215), 4 states have call successors, (108), 2 states have call predecessors, (108), 5 states have return successors, (104), 4 states have call predecessors, (104), 4 states have call successors, (104) [2021-11-12 22:57:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55354 states and 77980 transitions. [2021-11-12 22:57:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2021-11-12 22:57:14,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:57:14,717 INFO L514 BasicCegarLoop]: trace histogram [46, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 23, 23, 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] [2021-11-12 22:57:14,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:14,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 22:57:15,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:57:15,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:15,327 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:57:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:57:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1280265608, now seen corresponding path program 2 times [2021-11-12 22:57:15,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:57:15,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751361842] [2021-11-12 22:57:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:57:15,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:57:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:57:15,331 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:57:15,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:58:07,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:58:07,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:58:07,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 3772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:58:07,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9695 backedges. 1718 proven. 3 refuted. 0 times theorem prover too weak. 7974 trivial. 0 not checked. [2021-11-12 22:58:10,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9695 backedges. 0 proven. 333 refuted. 0 times theorem prover too weak. 9362 trivial. 0 not checked. [2021-11-12 22:58:14,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:14,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751361842] [2021-11-12 22:58:14,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751361842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:58:14,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752666193] [2021-11-12 22:58:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:58:14,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:58:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:58:14,314 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:58:14,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9a8ce3b-18ec-4f2e-b361-e34288a3735c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process