./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs --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 81d3a41c14974620b49988c1780c7d5a75f04674e564d23c865943e8c9fe2089 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:45,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:45,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:45,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:45,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:45,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:45,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:45,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:45,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:45,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:45,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:45,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:45,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:45,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:45,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:45,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:45,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:45,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:45,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:45,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:45,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:45,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:45,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:45,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:45,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:45,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:45,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:45,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:45,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:45,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:45,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:45,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:45,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:45,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:45,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:45,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:45,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:45,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:45,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:45,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:45,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:45,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:59:45,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:45,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:45,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:45,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:45,912 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:45,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:45,913 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:45,913 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:59:45,913 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:45,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:45,913 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:59:45,914 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:59:45,914 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:45,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:59:45,914 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:59:45,915 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:59:45,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:45,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:59:45,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:45,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:45,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:45,917 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:45,917 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:45,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:45,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:45,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:45,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:45,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:45,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:45,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:45,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:45,919 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:45,919 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:59:45,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:59:45,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:45,920 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:45,920 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:45,920 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_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81d3a41c14974620b49988c1780c7d5a75f04674e564d23c865943e8c9fe2089 [2021-11-19 13:59:46,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:46,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:46,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:46,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:46,299 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:46,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-19 13:59:46,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/d41d575e2/8300c5bd50ea419c9cd2370538a79dc5/FLAG41ff0837a [2021-11-19 13:59:47,512 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:47,513 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-19 13:59:47,583 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/d41d575e2/8300c5bd50ea419c9cd2370538a79dc5/FLAG41ff0837a [2021-11-19 13:59:47,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/d41d575e2/8300c5bd50ea419c9cd2370538a79dc5 [2021-11-19 13:59:47,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:47,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:47,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:47,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:47,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:47,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:47" (1/1) ... [2021-11-19 13:59:47,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f204217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:47, skipping insertion in model container [2021-11-19 13:59:47,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:47" (1/1) ... [2021-11-19 13:59:47,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:47,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:50,710 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:50,711 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:50,817 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:50,844 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 13:59:52,769 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519506,519519] [2021-11-19 13:59:52,771 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519651,519664] [2021-11-19 13:59:52,798 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:52,937 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) [2021-11-19 13:59:52,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5afbdaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:52, skipping insertion in model container [2021-11-19 13:59:52,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:52,938 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:59:52,942 INFO L158 Benchmark]: Toolchain (without parser) took 5239.28ms. Allocated memory was 109.1MB in the beginning and 213.9MB in the end (delta: 104.9MB). Free memory was 70.1MB in the beginning and 129.3MB in the end (delta: -59.2MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. [2021-11-19 13:59:52,943 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory was 86.3MB in the beginning and 86.3MB in the end (delta: 47.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:59:52,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 5235.13ms. Allocated memory was 109.1MB in the beginning and 213.9MB in the end (delta: 104.9MB). Free memory was 69.8MB in the beginning and 129.3MB in the end (delta: -59.5MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. [2021-11-19 13:59:52,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 109.1MB. Free memory was 86.3MB in the beginning and 86.3MB in the end (delta: 47.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 5235.13ms. Allocated memory was 109.1MB in the beginning and 213.9MB in the end (delta: 104.9MB). Free memory was 69.8MB in the beginning and 129.3MB in the end (delta: -59.5MB). Peak memory consumption was 60.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6853]: 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_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs --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 81d3a41c14974620b49988c1780c7d5a75f04674e564d23c865943e8c9fe2089 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:55,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:55,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:55,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:55,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:55,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:55,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:55,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:55,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:55,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:55,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:55,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:55,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:55,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:55,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:55,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:55,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:55,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:55,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:55,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:55,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:55,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:55,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:55,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:55,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:55,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:55,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:55,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:55,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:55,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:55,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:55,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:55,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:55,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:55,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:55,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:55,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:55,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:55,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:55,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:55,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:55,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:59:55,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:55,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:55,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:55,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:55,366 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:55,366 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:55,367 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:55,367 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:55,367 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:55,367 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:55,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:55,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:55,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:55,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:55,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:55,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:55,371 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:59:55,371 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:59:55,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:55,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:55,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:55,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:55,372 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:59:55,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:55,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:55,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:55,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:55,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:55,374 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:59:55,374 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:55,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:55,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:55,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:55,375 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_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81d3a41c14974620b49988c1780c7d5a75f04674e564d23c865943e8c9fe2089 [2021-11-19 13:59:55,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:55,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:55,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:55,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:55,797 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:55,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-19 13:59:55,877 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/aacb70936/9d2c060f5d1341409c852bdae7f3290a/FLAGaf7767690 [2021-11-19 13:59:57,111 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:57,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-19 13:59:57,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/aacb70936/9d2c060f5d1341409c852bdae7f3290a/FLAGaf7767690 [2021-11-19 13:59:57,329 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/data/aacb70936/9d2c060f5d1341409c852bdae7f3290a [2021-11-19 13:59:57,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:57,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:57,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:57,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:57,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:57,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:57" (1/1) ... [2021-11-19 13:59:57,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fe1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:57, skipping insertion in model container [2021-11-19 13:59:57,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:57" (1/1) ... [2021-11-19 13:59:57,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:57,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:02,463 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519506,519519] [2021-11-19 14:00:02,466 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519651,519664] [2021-11-19 14:00:02,494 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:02,566 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:00:02,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:03,255 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519506,519519] [2021-11-19 14:00:03,256 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519651,519664] [2021-11-19 14:00:03,261 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:03,297 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:00:03,833 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519506,519519] [2021-11-19 14:00:03,834 WARN L230 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_06f3a960-8522-475f-8465-c910fc6974b8/sv-benchmarks/c/ldv-challenges/linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i[519651,519664] [2021-11-19 14:00:03,841 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:04,436 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:00:04,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04 WrapperNode [2021-11-19 14:00:04,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:04,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:04,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:00:04,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:00:04,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:04,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,135 INFO L137 Inliner]: procedures = 588, calls = 6348, calls flagged for inlining = 279, calls inlined = 246, statements flattened = 11881 [2021-11-19 14:00:05,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:05,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:00:05,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:00:05,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:00:05,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:00:05,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:00:05,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:00:05,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:00:05,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (1/1) ... [2021-11-19 14:00:05,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:05,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:00:05,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:00:05,721 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-19 14:00:05,721 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-19 14:00:05,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:00:05,721 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:00:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-19 14:00:05,722 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-19 14:00:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_vfta [2021-11-19 14:00:05,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_vfta [2021-11-19 14:00:05,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:00:05,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:00:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_standby_eeprom [2021-11-19 14:00:05,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_standby_eeprom [2021-11-19 14:00:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-19 14:00:05,723 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-19 14:00:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-19 14:00:05,723 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-19 14:00:05,723 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-11-19 14:00:05,724 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-11-19 14:00:05,724 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-19 14:00:05,724 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-19 14:00:05,724 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_alloc_rx_buffers [2021-11-19 14:00:05,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_alloc_rx_buffers [2021-11-19 14:00:05,724 INFO L130 BoogieDeclarations]: Found specification of procedure mac_addr_valid [2021-11-19 14:00:05,725 INFO L138 BoogieDeclarations]: Found implementation of procedure mac_addr_valid [2021-11-19 14:00:05,725 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_vlan_rx_add_vid [2021-11-19 14:00:05,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_vlan_rx_add_vid [2021-11-19 14:00:05,725 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_free_tx_resources [2021-11-19 14:00:05,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_free_tx_resources [2021-11-19 14:00:05,725 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-19 14:00:05,725 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-19 14:00:05,726 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_set_multi [2021-11-19 14:00:05,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_set_multi [2021-11-19 14:00:05,726 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 14:00:05,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~structbegin~C_INT~structend~~TO~C_INT [2021-11-19 14:00:05,727 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_rar_set [2021-11-19 14:00:05,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_rar_set [2021-11-19 14:00:05,727 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-19 14:00:05,727 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-19 14:00:05,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-19 14:00:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-19 14:00:05,728 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-19 14:00:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-19 14:00:05,728 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-19 14:00:05,728 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-19 14:00:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_io_resume [2021-11-19 14:00:05,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_io_resume [2021-11-19 14:00:05,729 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-19 14:00:05,729 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-19 14:00:05,730 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:00:05,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:00:05,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:00:05,731 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-19 14:00:05,731 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-19 14:00:05,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:00:05,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:00:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:00:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_validate_eeprom_checksum [2021-11-19 14:00:05,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_validate_eeprom_checksum [2021-11-19 14:00:05,732 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 14:00:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 14:00:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_netpoll [2021-11-19 14:00:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_netpoll [2021-11-19 14:00:05,733 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-19 14:00:05,733 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-19 14:00:05,734 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_raise_clock [2021-11-19 14:00:05,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_raise_clock [2021-11-19 14:00:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_eeprom [2021-11-19 14:00:05,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_eeprom [2021-11-19 14:00:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-19 14:00:05,735 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-19 14:00:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_identify_xpak_vendor [2021-11-19 14:00:05,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_identify_xpak_vendor [2021-11-19 14:00:05,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-19 14:00:05,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-19 14:00:05,736 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_mac_reset [2021-11-19 14:00:05,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_mac_reset [2021-11-19 14:00:05,736 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_read_eeprom [2021-11-19 14:00:05,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_read_eeprom [2021-11-19 14:00:05,736 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-19 14:00:05,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~C_ULONG~X~C_INT~X~$Pointer$~TO~~dma_addr_t~0 [2021-11-19 14:00:05,737 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_free_rx_resources [2021-11-19 14:00:05,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_free_rx_resources [2021-11-19 14:00:05,738 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-19 14:00:05,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-19 14:00:05,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_after_alloc [2021-11-19 14:00:05,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_after_alloc [2021-11-19 14:00:05,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:00:05,739 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:00:05,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_interrupt_context [2021-11-19 14:00:05,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_interrupt_context [2021-11-19 14:00:05,739 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2021-11-19 14:00:05,740 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2021-11-19 14:00:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-19 14:00:05,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-19 14:00:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_err_code [2021-11-19 14:00:05,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_err_code [2021-11-19 14:00:05,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-19 14:00:05,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-19 14:00:05,741 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_regs_len [2021-11-19 14:00:05,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_regs_len [2021-11-19 14:00:05,741 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-19 14:00:05,741 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-19 14:00:05,741 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-19 14:00:05,742 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-19 14:00:05,742 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_read_phy_reg [2021-11-19 14:00:05,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_read_phy_reg [2021-11-19 14:00:05,742 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_check_for_link [2021-11-19 14:00:05,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_check_for_link [2021-11-19 14:00:05,743 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_validate_option [2021-11-19 14:00:05,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_validate_option [2021-11-19 14:00:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:00:05,746 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mod_timer [2021-11-19 14:00:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mod_timer [2021-11-19 14:00:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-19 14:00:05,748 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-19 14:00:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:00:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-19 14:00:05,749 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-19 14:00:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-19 14:00:05,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-19 14:00:05,755 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 14:00:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 14:00:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:00:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:00:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:00:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 14:00:05,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 14:00:05,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:00:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_lower_clock [2021-11-19 14:00:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_lower_clock [2021-11-19 14:00:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_reset [2021-11-19 14:00:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_reset [2021-11-19 14:00:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_exclusive_spin_is_locked [2021-11-19 14:00:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_exclusive_spin_is_locked [2021-11-19 14:00:05,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert [2021-11-19 14:00:05,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert [2021-11-19 14:00:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_remove [2021-11-19 14:00:05,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_remove [2021-11-19 14:00:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-19 14:00:05,758 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-19 14:00:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_eeprom_len [2021-11-19 14:00:05,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_eeprom_len [2021-11-19 14:00:05,758 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-19 14:00:05,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~C_ULONG~X~C_INT~X~$Pointer$~TO~VOID [2021-11-19 14:00:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_up [2021-11-19 14:00:05,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_up [2021-11-19 14:00:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_irq_enable [2021-11-19 14:00:05,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_irq_enable [2021-11-19 14:00:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2021-11-19 14:00:05,759 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2021-11-19 14:00:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-19 14:00:05,760 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-19 14:00:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_netdev [2021-11-19 14:00:05,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_netdev [2021-11-19 14:00:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_tx_resources [2021-11-19 14:00:05,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_tx_resources [2021-11-19 14:00:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_maybe_stop_tx [2021-11-19 14:00:05,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_maybe_stop_tx [2021-11-19 14:00:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_intr [2021-11-19 14:00:05,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_intr [2021-11-19 14:00:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-19 14:00:05,761 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-19 14:00:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 14:00:05,761 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 14:00:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:00:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_open [2021-11-19 14:00:05,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_open [2021-11-19 14:00:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:00:05,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:00:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2021-11-19 14:00:05,762 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2021-11-19 14:00:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:00:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-19 14:00:05,763 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-19 14:00:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:00:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:00:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:00:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:00:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:00:05,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:00:05,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:00:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-19 14:00:05,764 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-19 14:00:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2021-11-19 14:00:05,764 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2021-11-19 14:00:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_update_stats [2021-11-19 14:00:05,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_update_stats [2021-11-19 14:00:05,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_to_process_context [2021-11-19 14:00:05,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_to_process_context [2021-11-19 14:00:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_check_and_get_eeprom_data [2021-11-19 14:00:05,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_check_and_get_eeprom_data [2021-11-19 14:00:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure ethtool_cmd_speed_set [2021-11-19 14:00:05,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ethtool_cmd_speed_set [2021-11-19 14:00:05,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:00:05,765 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:00:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-19 14:00:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-19 14:00:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb_ip_align [2021-11-19 14:00:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb_ip_align [2021-11-19 14:00:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_close [2021-11-19 14:00:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_close [2021-11-19 14:00:05,766 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2021-11-19 14:00:05,766 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2021-11-19 14:00:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2021-11-19 14:00:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2021-11-19 14:00:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-19 14:00:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-19 14:00:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-19 14:00:05,767 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-19 14:00:05,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:00:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2021-11-19 14:00:05,768 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2021-11-19 14:00:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-19 14:00:05,768 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-19 14:00:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:00:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:00:05,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:00:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:00:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2021-11-19 14:00:05,769 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2021-11-19 14:00:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:00:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:00:05,769 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2021-11-19 14:00:05,769 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2021-11-19 14:00:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-19 14:00:05,770 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-19 14:00:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-19 14:00:05,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-19 14:00:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-19 14:00:05,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-19 14:00:05,770 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_link_reset [2021-11-19 14:00:05,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_link_reset [2021-11-19 14:00:05,771 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_set_speed_duplex [2021-11-19 14:00:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_set_speed_duplex [2021-11-19 14:00:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-19 14:00:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-19 14:00:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_nonatomic [2021-11-19 14:00:05,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_nonatomic [2021-11-19 14:00:05,855 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-11-19 14:00:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-11-19 14:00:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-19 14:00:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-19 14:00:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2021-11-19 14:00:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2021-11-19 14:00:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 14:00:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-19 14:00:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:00:05,856 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:00:05,856 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_unmap_and_free_tx_resource [2021-11-19 14:00:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_unmap_and_free_tx_resource [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2021-11-19 14:00:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:00:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_eeprom [2021-11-19 14:00:05,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_eeprom [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:00:05,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:00:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:00:05,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:00:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_write_phy_reg [2021-11-19 14:00:05,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_write_phy_reg [2021-11-19 14:00:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-19 14:00:05,858 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-19 14:00:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_ee_mac_addr [2021-11-19 14:00:05,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_ee_mac_addr [2021-11-19 14:00:05,858 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-19 14:00:05,858 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-19 14:00:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure dma_set_mask_and_coherent [2021-11-19 14:00:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_set_mask_and_coherent [2021-11-19 14:00:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_clean_tx_ring [2021-11-19 14:00:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_clean_tx_ring [2021-11-19 14:00:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure is_multicast_ether_addr [2021-11-19 14:00:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure is_multicast_ether_addr [2021-11-19 14:00:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-11-19 14:00:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-11-19 14:00:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_clean_rx_ring [2021-11-19 14:00:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_clean_rx_ring [2021-11-19 14:00:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_shift_out_bits [2021-11-19 14:00:05,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_shift_out_bits [2021-11-19 14:00:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_down [2021-11-19 14:00:05,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_down [2021-11-19 14:00:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_tx_timeout [2021-11-19 14:00:05,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_tx_timeout [2021-11-19 14:00:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_setup_rx_resources [2021-11-19 14:00:05,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_setup_rx_resources [2021-11-19 14:00:05,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-19 14:00:05,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-19 14:00:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2021-11-19 14:00:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2021-11-19 14:00:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2021-11-19 14:00:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2021-11-19 14:00:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-19 14:00:05,866 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-19 14:00:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-19 14:00:05,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-19 14:00:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-19 14:00:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure ixgb_get_eeprom_data [2021-11-19 14:00:05,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ixgb_get_eeprom_data [2021-11-19 14:00:07,282 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:00:07,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:00:08,439 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:02:42,953 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:02:42,980 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:02:42,981 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:02:42,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:02:42 BoogieIcfgContainer [2021-11-19 14:02:42,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:02:42,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:02:42,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:02:42,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:02:42,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:59:57" (1/3) ... [2021-11-19 14:02:42,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fb6392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:02:42, skipping insertion in model container [2021-11-19 14:02:42,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:04" (2/3) ... [2021-11-19 14:02:42,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fb6392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:02:42, skipping insertion in model container [2021-11-19 14:02:42,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:02:42" (3/3) ... [2021-11-19 14:02:42,996 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_linux-alloc-spinlock_drivers-net-ethernet-intel-ixgb-ixgb.cil.i [2021-11-19 14:02:43,002 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:02:43,002 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:02:43,063 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:02:43,069 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 [2021-11-19 14:02:43,069 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:02:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 3089 states, 2061 states have (on average 1.2518195050946144) internal successors, (2580), 2105 states have internal predecessors, (2580), 891 states have call successors, (891), 135 states have call predecessors, (891), 134 states have return successors, (887), 874 states have call predecessors, (887), 887 states have call successors, (887) [2021-11-19 14:02:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:02:43,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:43,170 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:43,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1574577654, now seen corresponding path program 1 times [2021-11-19 14:02:43,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:43,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775188496] [2021-11-19 14:02:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:43,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:43,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:43,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:02:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:47,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 4350 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:02:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:02:49,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:02:51,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:51,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775188496] [2021-11-19 14:02:51,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775188496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:02:51,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1773177204] [2021-11-19 14:02:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:51,970 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:02:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:02:51,973 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:02:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2021-11-19 14:02:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 4350 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:02:54,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:02:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:02:59,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1773177204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:59,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:02:59,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:02:59,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055640606] [2021-11-19 14:02:59,084 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:59,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:02:59,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:02:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:02:59,124 INFO L87 Difference]: Start difference. First operand has 3089 states, 2061 states have (on average 1.2518195050946144) internal successors, (2580), 2105 states have internal predecessors, (2580), 891 states have call successors, (891), 135 states have call predecessors, (891), 134 states have return successors, (887), 874 states have call predecessors, (887), 887 states have call successors, (887) Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:03:00,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:17,915 INFO L93 Difference]: Finished difference Result 6149 states and 8780 transitions. [2021-11-19 14:03:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:17,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 163 [2021-11-19 14:03:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:17,982 INFO L225 Difference]: With dead ends: 6149 [2021-11-19 14:03:17,983 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:03:18,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:18,020 INFO L933 BasicCegarLoop]: 4329 mSDtfsCounter, 4247 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4247 SdHoareTripleChecker+Valid, 6879 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:18,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4247 Valid, 6879 Invalid, 1803 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 1781 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2021-11-19 14:03:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:03:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:03:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.240612648221344) internal successors, (2511), 2065 states have internal predecessors, (2511), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:03:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4233 transitions. [2021-11-19 14:03:18,505 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4233 transitions. Word has length 163 [2021-11-19 14:03:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:18,507 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4233 transitions. [2021-11-19 14:03:18,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:03:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4233 transitions. [2021-11-19 14:03:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-19 14:03:18,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:18,514 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:18,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:18,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:18,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:18,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:18,918 INFO L85 PathProgramCache]: Analyzing trace with hash -791721547, now seen corresponding path program 1 times [2021-11-19 14:03:18,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:18,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787704089] [2021-11-19 14:03:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:18,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:18,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:18,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:18,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:03:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 4351 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:03:23,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:03:24,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:03:26,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:03:26,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787704089] [2021-11-19 14:03:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787704089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:03:26,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565087589] [2021-11-19 14:03:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:26,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:03:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:03:26,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:03:26,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:03:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 4351 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:03:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:03:31,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:03:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:03:33,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [565087589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:03:33,198 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:03:33,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:03:33,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699198324] [2021-11-19 14:03:33,199 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:03:33,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:03:33,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:03:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:03:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:33,202 INFO L87 Difference]: Start difference. First operand 3019 states and 4233 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:03:34,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:03:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:03:51,645 INFO L93 Difference]: Finished difference Result 6021 states and 8478 transitions. [2021-11-19 14:03:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:03:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 164 [2021-11-19 14:03:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:03:51,679 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:03:51,679 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:03:51,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:03:51,709 INFO L933 BasicCegarLoop]: 4231 mSDtfsCounter, 4149 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4149 SdHoareTripleChecker+Valid, 6739 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:03:51,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4149 Valid, 6739 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2021-11-19 14:03:51,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:03:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:03:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2401185770750989) internal successors, (2510), 2065 states have internal predecessors, (2510), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:03:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4232 transitions. [2021-11-19 14:03:51,962 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4232 transitions. Word has length 164 [2021-11-19 14:03:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:03:51,965 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4232 transitions. [2021-11-19 14:03:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:03:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4232 transitions. [2021-11-19 14:03:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:03:51,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:03:51,974 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:03:52,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:52,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:03:52,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:03:52,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:03:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:03:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2116497894, now seen corresponding path program 1 times [2021-11-19 14:03:52,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:03:52,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88489477] [2021-11-19 14:03:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:03:52,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:03:52,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:03:52,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:03:52,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:03:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:03:56,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 4352 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:03:56,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:03:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:03:58,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:04:00,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:00,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88489477] [2021-11-19 14:04:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88489477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:00,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [489379812] [2021-11-19 14:04:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:00,124 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:00,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:00,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:00,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:04:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 4352 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:04:02,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:04:05,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:04:06,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [489379812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:06,740 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:06,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:04:06,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532172930] [2021-11-19 14:04:06,741 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:06,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:04:06,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:04:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:06,743 INFO L87 Difference]: Start difference. First operand 3019 states and 4232 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:04:07,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:04:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:04:26,280 INFO L93 Difference]: Finished difference Result 6021 states and 8476 transitions. [2021-11-19 14:04:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:04:26,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 165 [2021-11-19 14:04:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:04:26,313 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:04:26,314 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:04:26,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:26,339 INFO L933 BasicCegarLoop]: 4230 mSDtfsCounter, 6591 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6591 SdHoareTripleChecker+Valid, 6737 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:04:26,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6591 Valid, 6737 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2021-11-19 14:04:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:04:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:04:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2396245059288538) internal successors, (2509), 2065 states have internal predecessors, (2509), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:04:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4231 transitions. [2021-11-19 14:04:26,576 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4231 transitions. Word has length 165 [2021-11-19 14:04:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:04:26,578 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4231 transitions. [2021-11-19 14:04:26,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:04:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4231 transitions. [2021-11-19 14:04:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 14:04:26,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:04:26,583 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:04:26,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:26,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:04:27,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:27,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:04:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:04:27,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2103463343, now seen corresponding path program 1 times [2021-11-19 14:04:27,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:04:27,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202364906] [2021-11-19 14:04:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:27,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:04:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:04:27,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:04:27,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:04:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 4353 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:04:31,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:04:33,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:04:35,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:04:35,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202364906] [2021-11-19 14:04:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202364906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:04:35,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2035311250] [2021-11-19 14:04:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:04:35,393 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:04:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:04:35,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:04:35,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:04:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:04:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 4353 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:04:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:04:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:04:40,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:04:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:04:42,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2035311250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:04:42,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:04:42,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:04:42,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637331977] [2021-11-19 14:04:42,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:04:42,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:04:42,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:04:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:04:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:04:42,111 INFO L87 Difference]: Start difference. First operand 3019 states and 4231 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:04:43,563 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:01,222 INFO L93 Difference]: Finished difference Result 6021 states and 8474 transitions. [2021-11-19 14:05:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:05:01,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 166 [2021-11-19 14:05:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:01,253 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:05:01,254 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:05:01,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:01,281 INFO L933 BasicCegarLoop]: 4229 mSDtfsCounter, 4147 mSDsluCounter, 2506 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4147 SdHoareTripleChecker+Valid, 6735 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:01,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4147 Valid, 6735 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2021-11-19 14:05:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:05:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:05:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2391304347826086) internal successors, (2508), 2065 states have internal predecessors, (2508), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:05:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4230 transitions. [2021-11-19 14:05:01,539 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4230 transitions. Word has length 166 [2021-11-19 14:05:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:01,539 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4230 transitions. [2021-11-19 14:05:01,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:05:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4230 transitions. [2021-11-19 14:05:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 14:05:01,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:01,546 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:01,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:01,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:01,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:01,969 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:05:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash 336241090, now seen corresponding path program 1 times [2021-11-19 14:05:01,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:01,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267473066] [2021-11-19 14:05:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:01,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:01,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:01,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:05:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 4354 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:05:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:05:07,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:05:09,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:09,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267473066] [2021-11-19 14:05:09,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267473066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:05:09,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433693405] [2021-11-19 14:05:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:09,769 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:05:09,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:05:09,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:05:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 4354 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:05:12,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:05:15,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:05:16,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433693405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:16,707 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:05:16,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:05:16,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972900335] [2021-11-19 14:05:16,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:16,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:05:16,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:05:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:16,710 INFO L87 Difference]: Start difference. First operand 3019 states and 4230 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:05:18,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:05:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:05:34,905 INFO L93 Difference]: Finished difference Result 6021 states and 8472 transitions. [2021-11-19 14:05:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:05:34,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 167 [2021-11-19 14:05:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:05:34,926 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:05:34,926 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:05:34,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:34,940 INFO L933 BasicCegarLoop]: 4228 mSDtfsCounter, 4146 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4146 SdHoareTripleChecker+Valid, 6733 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:05:34,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4146 Valid, 6733 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.9s Time] [2021-11-19 14:05:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:05:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:05:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2386363636363635) internal successors, (2507), 2065 states have internal predecessors, (2507), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:05:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4229 transitions. [2021-11-19 14:05:35,183 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4229 transitions. Word has length 167 [2021-11-19 14:05:35,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:05:35,184 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4229 transitions. [2021-11-19 14:05:35,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:05:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4229 transitions. [2021-11-19 14:05:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 14:05:35,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:05:35,189 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:05:35,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:35,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:05:35,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:35,605 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:05:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:05:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1227816211, now seen corresponding path program 1 times [2021-11-19 14:05:35,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:05:35,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117180952] [2021-11-19 14:05:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:35,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:05:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:05:35,611 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:05:35,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:05:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:05:40,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:05:41,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:05:43,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:05:43,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117180952] [2021-11-19 14:05:43,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117180952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:05:43,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954767533] [2021-11-19 14:05:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:05:43,881 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:05:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:05:43,884 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:05:43,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:05:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:05:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:05:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:05:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:05:49,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:05:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:05:50,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954767533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:05:50,793 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:05:50,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:05:50,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63484072] [2021-11-19 14:05:50,793 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:05:50,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:05:50,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:05:50,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:05:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:05:50,795 INFO L87 Difference]: Start difference. First operand 3019 states and 4229 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:05:52,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:09,248 INFO L93 Difference]: Finished difference Result 6021 states and 8470 transitions. [2021-11-19 14:06:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:06:09,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 168 [2021-11-19 14:06:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:09,270 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:06:09,271 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:06:09,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:09,280 INFO L933 BasicCegarLoop]: 4227 mSDtfsCounter, 6582 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6582 SdHoareTripleChecker+Valid, 6731 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:09,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6582 Valid, 6731 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 18.1s Time] [2021-11-19 14:06:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:06:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:06:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2381422924901186) internal successors, (2506), 2065 states have internal predecessors, (2506), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:06:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4228 transitions. [2021-11-19 14:06:09,629 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4228 transitions. Word has length 168 [2021-11-19 14:06:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:09,631 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4228 transitions. [2021-11-19 14:06:09,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:06:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4228 transitions. [2021-11-19 14:06:09,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:06:09,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:09,638 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:09,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:10,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:06:10,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1940531614, now seen corresponding path program 1 times [2021-11-19 14:06:10,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:10,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497968904] [2021-11-19 14:06:10,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:10,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:10,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:10,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:10,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:06:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:13,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 4356 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:06:13,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:06:15,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:06:17,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:17,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497968904] [2021-11-19 14:06:17,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497968904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:06:17,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708791605] [2021-11-19 14:06:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:17,427 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:17,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:06:17,428 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:06:17,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:06:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 4356 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:06:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:06:22,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:06:23,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708791605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:23,702 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:06:23,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:06:23,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494175156] [2021-11-19 14:06:23,702 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:23,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:06:23,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:06:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:23,704 INFO L87 Difference]: Start difference. First operand 3019 states and 4228 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:06:24,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:06:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:06:40,563 INFO L93 Difference]: Finished difference Result 6021 states and 8468 transitions. [2021-11-19 14:06:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:06:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 169 [2021-11-19 14:06:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:06:40,584 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:06:40,584 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:06:40,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:40,595 INFO L933 BasicCegarLoop]: 4226 mSDtfsCounter, 6579 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6579 SdHoareTripleChecker+Valid, 6729 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:06:40,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6579 Valid, 6729 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2021-11-19 14:06:40,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:06:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:06:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2376482213438735) internal successors, (2505), 2065 states have internal predecessors, (2505), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:06:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4227 transitions. [2021-11-19 14:06:40,841 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4227 transitions. Word has length 169 [2021-11-19 14:06:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:06:40,842 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4227 transitions. [2021-11-19 14:06:40,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:06:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4227 transitions. [2021-11-19 14:06:40,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:06:40,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:06:40,846 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:06:40,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:41,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:06:41,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:41,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:06:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:06:41,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1489582985, now seen corresponding path program 1 times [2021-11-19 14:06:41,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:06:41,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805492068] [2021-11-19 14:06:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:41,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:06:41,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:06:41,273 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:06:41,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:06:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 4357 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:06:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:06:46,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:06:48,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:06:48,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805492068] [2021-11-19 14:06:48,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805492068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:06:48,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1637493987] [2021-11-19 14:06:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:06:48,415 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:06:48,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:06:48,429 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:06:48,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:06:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:06:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 4357 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:06:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:06:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:06:53,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:06:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:06:54,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1637493987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:06:54,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:06:54,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:06:54,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114305522] [2021-11-19 14:06:54,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:06:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:06:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:06:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:06:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:06:54,852 INFO L87 Difference]: Start difference. First operand 3019 states and 4227 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:06:56,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:12,475 INFO L93 Difference]: Finished difference Result 6021 states and 8466 transitions. [2021-11-19 14:07:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:07:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 170 [2021-11-19 14:07:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:12,499 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:07:12,500 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:07:12,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:12,512 INFO L933 BasicCegarLoop]: 4225 mSDtfsCounter, 6576 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6576 SdHoareTripleChecker+Valid, 6727 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:12,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6576 Valid, 6727 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2021-11-19 14:07:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:07:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:07:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2371541501976284) internal successors, (2504), 2065 states have internal predecessors, (2504), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:07:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4226 transitions. [2021-11-19 14:07:12,778 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4226 transitions. Word has length 170 [2021-11-19 14:07:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:12,779 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4226 transitions. [2021-11-19 14:07:12,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:07:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4226 transitions. [2021-11-19 14:07:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:07:12,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:12,784 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:12,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:13,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-19 14:07:13,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:13,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash 509593978, now seen corresponding path program 1 times [2021-11-19 14:07:13,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:13,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130566920] [2021-11-19 14:07:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:13,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:13,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:13,201 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:13,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:07:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:17,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 4358 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:07:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:07:19,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:07:20,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:20,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130566920] [2021-11-19 14:07:20,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130566920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:20,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1813972441] [2021-11-19 14:07:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:20,819 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:20,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:07:20,820 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:07:20,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:07:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 4358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:07:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:07:25,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:07:27,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1813972441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:07:27,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:07:27,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:07:27,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730577929] [2021-11-19 14:07:27,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:07:27,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:07:27,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:07:27,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:07:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:27,505 INFO L87 Difference]: Start difference. First operand 3019 states and 4226 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:07:28,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:07:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:07:44,957 INFO L93 Difference]: Finished difference Result 6021 states and 8464 transitions. [2021-11-19 14:07:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:07:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 171 [2021-11-19 14:07:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:07:44,983 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:07:44,983 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:07:44,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 670 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:07:44,996 INFO L933 BasicCegarLoop]: 4224 mSDtfsCounter, 4142 mSDsluCounter, 2501 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4142 SdHoareTripleChecker+Valid, 6725 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:07:44,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4142 Valid, 6725 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time] [2021-11-19 14:07:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:07:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:07:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2366600790513833) internal successors, (2503), 2065 states have internal predecessors, (2503), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:07:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4225 transitions. [2021-11-19 14:07:45,267 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4225 transitions. Word has length 171 [2021-11-19 14:07:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:07:45,268 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4225 transitions. [2021-11-19 14:07:45,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:07:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4225 transitions. [2021-11-19 14:07:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:07:45,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:07:45,272 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:07:45,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:07:45,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 14:07:45,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:07:45,688 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:07:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:07:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash 309222437, now seen corresponding path program 1 times [2021-11-19 14:07:45,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:07:45,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911120301] [2021-11-19 14:07:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:45,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:07:45,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:07:45,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:07:45,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:07:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:49,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 4359 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:07:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:07:51,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:07:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:07:53,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:07:53,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911120301] [2021-11-19 14:07:53,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911120301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:07:53,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1867564303] [2021-11-19 14:07:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:07:53,296 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:07:53,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:07:53,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:07:53,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:07:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:07:55,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 4359 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:07:55,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:07:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:07:58,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:08:00,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1867564303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:00,115 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:08:00,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:08:00,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502740653] [2021-11-19 14:08:00,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:08:00,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:08:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:00,118 INFO L87 Difference]: Start difference. First operand 3019 states and 4225 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:08:01,256 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:17,785 INFO L93 Difference]: Finished difference Result 6021 states and 8462 transitions. [2021-11-19 14:08:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:08:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 172 [2021-11-19 14:08:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:17,808 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:08:17,809 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:08:17,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:17,824 INFO L933 BasicCegarLoop]: 4223 mSDtfsCounter, 4141 mSDsluCounter, 2500 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4141 SdHoareTripleChecker+Valid, 6723 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:17,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4141 Valid, 6723 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2021-11-19 14:08:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:08:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:08:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2361660079051384) internal successors, (2502), 2065 states have internal predecessors, (2502), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:08:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4224 transitions. [2021-11-19 14:08:18,078 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4224 transitions. Word has length 172 [2021-11-19 14:08:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:18,079 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4224 transitions. [2021-11-19 14:08:18,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:08:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4224 transitions. [2021-11-19 14:08:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 14:08:18,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:18,086 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:18,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:18,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:18,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:08:18,500 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1492811434, now seen corresponding path program 1 times [2021-11-19 14:08:18,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:18,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503570216] [2021-11-19 14:08:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:18,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:18,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:18,507 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:18,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:08:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:22,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 4360 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:08:22,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:08:24,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:08:26,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:26,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503570216] [2021-11-19 14:08:26,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503570216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:08:26,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824271044] [2021-11-19 14:08:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:26,557 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:08:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:08:26,562 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:08:26,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:08:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 4360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:08:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:08:31,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:08:33,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1824271044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:08:33,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:08:33,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:08:33,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84958008] [2021-11-19 14:08:33,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:08:33,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:08:33,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:08:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:08:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:33,196 INFO L87 Difference]: Start difference. First operand 3019 states and 4224 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:08:34,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:08:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:08:50,973 INFO L93 Difference]: Finished difference Result 6021 states and 8460 transitions. [2021-11-19 14:08:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:08:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 173 [2021-11-19 14:08:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:08:50,992 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:08:50,992 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:08:51,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:08:51,003 INFO L933 BasicCegarLoop]: 4222 mSDtfsCounter, 4140 mSDsluCounter, 2499 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4140 SdHoareTripleChecker+Valid, 6721 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:08:51,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4140 Valid, 6721 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2021-11-19 14:08:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:08:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:08:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2356719367588933) internal successors, (2501), 2065 states have internal predecessors, (2501), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:08:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4223 transitions. [2021-11-19 14:08:51,303 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4223 transitions. Word has length 173 [2021-11-19 14:08:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:08:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4223 transitions. [2021-11-19 14:08:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:08:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4223 transitions. [2021-11-19 14:08:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 14:08:51,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:08:51,309 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:08:51,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:51,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:08:51,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:08:51,732 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:08:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:08:51,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1406769983, now seen corresponding path program 1 times [2021-11-19 14:08:51,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:08:51,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308781496] [2021-11-19 14:08:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:51,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:08:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:08:51,740 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:08:51,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:08:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:08:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 4361 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:08:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:08:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:08:57,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:08:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:08:59,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:08:59,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308781496] [2021-11-19 14:08:59,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308781496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:08:59,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320159283] [2021-11-19 14:08:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:08:59,858 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:08:59,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:08:59,870 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:08:59,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 14:09:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:02,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 4361 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:09:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:09:04,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:09:06,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320159283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:06,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:09:06,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:09:06,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954661884] [2021-11-19 14:09:06,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:06,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:09:06,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:06,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:09:06,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:06,351 INFO L87 Difference]: Start difference. First operand 3019 states and 4223 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:09:07,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:25,226 INFO L93 Difference]: Finished difference Result 6021 states and 8458 transitions. [2021-11-19 14:09:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:09:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 174 [2021-11-19 14:09:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:25,242 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:09:25,242 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:09:25,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:25,251 INFO L933 BasicCegarLoop]: 4221 mSDtfsCounter, 4139 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4139 SdHoareTripleChecker+Valid, 6719 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:25,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4139 Valid, 6719 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 18.5s Time] [2021-11-19 14:09:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:09:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:09:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2351778656126482) internal successors, (2500), 2065 states have internal predecessors, (2500), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:09:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4222 transitions. [2021-11-19 14:09:25,551 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4222 transitions. Word has length 174 [2021-11-19 14:09:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:25,555 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4222 transitions. [2021-11-19 14:09:25,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:09:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4222 transitions. [2021-11-19 14:09:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-19 14:09:25,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:25,560 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:25,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:25,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:25,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:25,989 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1375031602, now seen corresponding path program 1 times [2021-11-19 14:09:25,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:25,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336502220] [2021-11-19 14:09:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:25,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:25,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:25,998 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:26,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:09:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 4362 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:09:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:09:32,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:09:33,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:09:33,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336502220] [2021-11-19 14:09:33,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336502220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:09:33,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467123646] [2021-11-19 14:09:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:33,998 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:09:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:09:34,011 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:09:34,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:09:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:09:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 4362 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:09:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:09:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:09:39,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:09:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:09:40,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1467123646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:09:40,795 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:09:40,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:09:40,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165971061] [2021-11-19 14:09:40,796 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:09:40,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:09:40,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:09:40,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:09:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:40,797 INFO L87 Difference]: Start difference. First operand 3019 states and 4222 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:09:42,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:09:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:09:58,781 INFO L93 Difference]: Finished difference Result 6021 states and 8456 transitions. [2021-11-19 14:09:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:09:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 175 [2021-11-19 14:09:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:09:58,796 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:09:58,796 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:09:58,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 686 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:09:58,807 INFO L933 BasicCegarLoop]: 4220 mSDtfsCounter, 4138 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4138 SdHoareTripleChecker+Valid, 6717 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:09:58,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4138 Valid, 6717 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.6s Time] [2021-11-19 14:09:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:09:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:09:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.234683794466403) internal successors, (2499), 2065 states have internal predecessors, (2499), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:09:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4221 transitions. [2021-11-19 14:09:59,030 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4221 transitions. Word has length 175 [2021-11-19 14:09:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:09:59,031 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4221 transitions. [2021-11-19 14:09:59,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:09:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4221 transitions. [2021-11-19 14:09:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 14:09:59,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:09:59,035 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:09:59,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:59,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:09:59,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:09:59,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:09:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:09:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1826051421, now seen corresponding path program 1 times [2021-11-19 14:09:59,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:09:59,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192774983] [2021-11-19 14:09:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:09:59,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:09:59,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:09:59,469 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:09:59,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:10:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:03,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 4363 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:10:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:10:05,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:10:07,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:07,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192774983] [2021-11-19 14:10:07,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192774983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:07,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [223702709] [2021-11-19 14:10:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:07,559 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:07,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:07,560 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:07,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:10:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 4363 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:10:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:10:12,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:10:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [223702709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:14,637 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:10:14,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:10:14,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296944830] [2021-11-19 14:10:14,638 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:14,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:10:14,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:10:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:14,640 INFO L87 Difference]: Start difference. First operand 3019 states and 4221 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:10:16,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:10:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:10:34,133 INFO L93 Difference]: Finished difference Result 6021 states and 8454 transitions. [2021-11-19 14:10:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:10:34,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 176 [2021-11-19 14:10:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:10:34,153 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:10:34,153 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:10:34,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:34,171 INFO L933 BasicCegarLoop]: 4219 mSDtfsCounter, 6558 mSDsluCounter, 2496 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6558 SdHoareTripleChecker+Valid, 6715 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:10:34,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6558 Valid, 6715 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2021-11-19 14:10:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:10:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:10:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.2341897233201582) internal successors, (2498), 2065 states have internal predecessors, (2498), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:10:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4220 transitions. [2021-11-19 14:10:34,657 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4220 transitions. Word has length 176 [2021-11-19 14:10:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:10:34,658 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4220 transitions. [2021-11-19 14:10:34,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:10:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4220 transitions. [2021-11-19 14:10:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:10:34,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:10:34,666 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:10:34,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:10:34,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-19 14:10:35,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:10:35,089 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:10:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:10:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1257686770, now seen corresponding path program 1 times [2021-11-19 14:10:35,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:10:35,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285598156] [2021-11-19 14:10:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:35,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:10:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:10:35,094 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:10:35,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:10:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 4364 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:10:39,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:10:41,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:10:43,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:10:43,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285598156] [2021-11-19 14:10:43,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285598156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:10:43,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1050431663] [2021-11-19 14:10:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:10:43,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:10:43,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:10:43,385 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:10:43,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-19 14:10:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:10:45,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 4364 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:10:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:10:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:10:48,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:10:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:10:50,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1050431663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:10:50,482 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:10:50,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [8, 8] total 12 [2021-11-19 14:10:50,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293447786] [2021-11-19 14:10:50,483 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:10:50,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:10:50,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:10:50,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:10:50,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:10:50,484 INFO L87 Difference]: Start difference. First operand 3019 states and 4220 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:10:51,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:11:08,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:08,392 INFO L93 Difference]: Finished difference Result 6021 states and 8452 transitions. [2021-11-19 14:11:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:11:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) Word has length 177 [2021-11-19 14:11:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:08,411 INFO L225 Difference]: With dead ends: 6021 [2021-11-19 14:11:08,411 INFO L226 Difference]: Without dead ends: 3019 [2021-11-19 14:11:08,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:11:08,426 INFO L933 BasicCegarLoop]: 4218 mSDtfsCounter, 4136 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4136 SdHoareTripleChecker+Valid, 6713 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:08,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4136 Valid, 6713 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2021-11-19 14:11:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-19 14:11:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-19 14:11:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2024 states have (on average 1.233695652173913) internal successors, (2497), 2065 states have internal predecessors, (2497), 861 states have call successors, (861), 132 states have call predecessors, (861), 132 states have return successors, (861), 848 states have call predecessors, (861), 861 states have call successors, (861) [2021-11-19 14:11:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4219 transitions. [2021-11-19 14:11:08,795 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4219 transitions. Word has length 177 [2021-11-19 14:11:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:08,796 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4219 transitions. [2021-11-19 14:11:08,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 3 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (36), 4 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-19 14:11:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4219 transitions. [2021-11-19 14:11:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:11:08,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:08,809 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:08,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:09,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-19 14:11:09,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:09,232 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:09,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1229057619, now seen corresponding path program 1 times [2021-11-19 14:11:09,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:09,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159369830] [2021-11-19 14:11:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:09,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:09,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:09,238 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:09,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:11:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 4364 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:11:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 106 proven. 3 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 14:11:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-19 14:11:17,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:17,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159369830] [2021-11-19 14:11:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159369830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:11:17,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1686918907] [2021-11-19 14:11:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:17,560 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:11:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:11:17,561 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:11:17,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-19 14:11:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 4364 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:11:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:11:21,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-19 14:11:21,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1686918907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:11:21,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:11:21,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 13 [2021-11-19 14:11:21,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471173748] [2021-11-19 14:11:21,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:21,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:11:21,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:11:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:11:21,848 INFO L87 Difference]: Start difference. First operand 3019 states and 4219 transitions. Second operand has 6 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:11:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:23,032 INFO L93 Difference]: Finished difference Result 6033 states and 8449 transitions. [2021-11-19 14:11:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:11:23,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 177 [2021-11-19 14:11:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:23,059 INFO L225 Difference]: With dead ends: 6033 [2021-11-19 14:11:23,059 INFO L226 Difference]: Without dead ends: 3031 [2021-11-19 14:11:23,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 693 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:23,075 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 12 mSDsluCounter, 16857 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21074 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:23,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21074 Invalid, 35 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:11:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-11-19 14:11:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 3031. [2021-11-19 14:11:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2031 states have (on average 1.2328902018709995) internal successors, (2504), 2072 states have internal predecessors, (2504), 864 states have call successors, (864), 134 states have call predecessors, (864), 134 states have return successors, (864), 851 states have call predecessors, (864), 864 states have call successors, (864) [2021-11-19 14:11:23,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4232 transitions. [2021-11-19 14:11:23,471 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4232 transitions. Word has length 177 [2021-11-19 14:11:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:23,472 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 4232 transitions. [2021-11-19 14:11:23,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 3 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:11:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4232 transitions. [2021-11-19 14:11:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-19 14:11:23,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:23,476 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:23,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:23,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:23,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:11:23,900 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1767287805, now seen corresponding path program 1 times [2021-11-19 14:11:23,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:23,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208371156] [2021-11-19 14:11:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:23,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:23,909 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:23,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:11:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 4406 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:11:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 130 proven. 3 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-19 14:11:30,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 14:11:32,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:32,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208371156] [2021-11-19 14:11:32,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208371156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:11:32,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894534597] [2021-11-19 14:11:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:32,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:11:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:11:32,701 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:11:32,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-19 14:11:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:44,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 4406 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:11:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-19 14:11:47,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-11-19 14:11:49,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894534597] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:49,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:11:49,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8, 6] total 13 [2021-11-19 14:11:49,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990809757] [2021-11-19 14:11:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:49,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:11:49,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:11:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:11:49,034 INFO L87 Difference]: Start difference. First operand 3031 states and 4232 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:11:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:11:49,913 INFO L93 Difference]: Finished difference Result 6049 states and 8446 transitions. [2021-11-19 14:11:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:11:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 201 [2021-11-19 14:11:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:11:49,935 INFO L225 Difference]: With dead ends: 6049 [2021-11-19 14:11:49,935 INFO L226 Difference]: Without dead ends: 3031 [2021-11-19 14:11:49,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:11:49,952 INFO L933 BasicCegarLoop]: 4215 mSDtfsCounter, 903 mSDsluCounter, 15677 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 19892 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:11:49,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 19892 Invalid, 12 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:11:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-11-19 14:11:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 3031. [2021-11-19 14:11:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2031 states have (on average 1.2323978335795174) internal successors, (2503), 2071 states have internal predecessors, (2503), 864 states have call successors, (864), 134 states have call predecessors, (864), 134 states have return successors, (864), 851 states have call predecessors, (864), 864 states have call successors, (864) [2021-11-19 14:11:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4231 transitions. [2021-11-19 14:11:50,377 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4231 transitions. Word has length 201 [2021-11-19 14:11:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:11:50,379 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 4231 transitions. [2021-11-19 14:11:50,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:11:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4231 transitions. [2021-11-19 14:11:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-19 14:11:50,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:11:50,453 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:11:50,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:50,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:11:50,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:11:50,854 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:11:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:11:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1572310816, now seen corresponding path program 1 times [2021-11-19 14:11:50,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:11:50,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106604740] [2021-11-19 14:11:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:11:50,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:11:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:11:50,859 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:11:50,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:11:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:11:55,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 4417 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:11:55,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:11:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-19 14:11:57,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:11:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-19 14:11:59,861 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:11:59,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106604740] [2021-11-19 14:11:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106604740] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:11:59,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:11:59,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 15 [2021-11-19 14:11:59,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558363338] [2021-11-19 14:11:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:11:59,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:11:59,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:11:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:11:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:11:59,863 INFO L87 Difference]: Start difference. First operand 3031 states and 4231 transitions. Second operand has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 5 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-19 14:12:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:07,930 INFO L93 Difference]: Finished difference Result 7787 states and 11048 transitions. [2021-11-19 14:12:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:12:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 5 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 205 [2021-11-19 14:12:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:07,958 INFO L225 Difference]: With dead ends: 7787 [2021-11-19 14:12:07,958 INFO L226 Difference]: Without dead ends: 4772 [2021-11-19 14:12:07,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-11-19 14:12:07,969 INFO L933 BasicCegarLoop]: 5719 mSDtfsCounter, 2467 mSDsluCounter, 53722 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2711 SdHoareTripleChecker+Valid, 59441 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2711 Valid, 59441 Invalid, 1234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [753 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-19 14:12:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-11-19 14:12:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3039. [2021-11-19 14:12:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3039 states, 2037 states have (on average 1.2317133038782524) internal successors, (2509), 2077 states have internal predecessors, (2509), 866 states have call successors, (866), 134 states have call predecessors, (866), 134 states have return successors, (866), 853 states have call predecessors, (866), 866 states have call successors, (866) [2021-11-19 14:12:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4241 transitions. [2021-11-19 14:12:08,435 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4241 transitions. Word has length 205 [2021-11-19 14:12:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:08,436 INFO L470 AbstractCegarLoop]: Abstraction has 3039 states and 4241 transitions. [2021-11-19 14:12:08,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 5 states have call successors, (26), 2 states have call predecessors, (26), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-19 14:12:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4241 transitions. [2021-11-19 14:12:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-19 14:12:08,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:08,440 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:08,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:08,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:08,656 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1957441723, now seen corresponding path program 1 times [2021-11-19 14:12:08,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:08,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238178122] [2021-11-19 14:12:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:08,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:08,663 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:08,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:12:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 4463 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:12:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-19 14:12:14,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-11-19 14:12:14,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:14,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238178122] [2021-11-19 14:12:14,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238178122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:12:14,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:12:14,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-19 14:12:14,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079775800] [2021-11-19 14:12:14,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:14,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:12:14,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:12:14,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:12:14,999 INFO L87 Difference]: Start difference. First operand 3039 states and 4241 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:12:17,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:12:17,925 INFO L93 Difference]: Finished difference Result 6167 states and 8619 transitions. [2021-11-19 14:12:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:12:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 222 [2021-11-19 14:12:17,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:12:17,945 INFO L225 Difference]: With dead ends: 6167 [2021-11-19 14:12:17,945 INFO L226 Difference]: Without dead ends: 3145 [2021-11-19 14:12:17,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:12:17,958 INFO L933 BasicCegarLoop]: 4249 mSDtfsCounter, 98 mSDsluCounter, 16925 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 21174 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:12:17,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 21174 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:12:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-11-19 14:12:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 3044. [2021-11-19 14:12:18,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2041 states have (on average 1.2312591866731994) internal successors, (2513), 2081 states have internal predecessors, (2513), 866 states have call successors, (866), 134 states have call predecessors, (866), 135 states have return successors, (868), 854 states have call predecessors, (868), 866 states have call successors, (868) [2021-11-19 14:12:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4247 transitions. [2021-11-19 14:12:18,413 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4247 transitions. Word has length 222 [2021-11-19 14:12:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:12:18,414 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 4247 transitions. [2021-11-19 14:12:18,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-19 14:12:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4247 transitions. [2021-11-19 14:12:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-19 14:12:18,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:12:18,419 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:12:18,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:12:18,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:12:18,633 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_alloc_nonatomicErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_alloc_flagsErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:12:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:12:18,633 INFO L85 PathProgramCache]: Analyzing trace with hash -416786123, now seen corresponding path program 1 times [2021-11-19 14:12:18,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:12:18,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330904830] [2021-11-19 14:12:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:12:18,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:12:18,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:12:18,640 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:12:18,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06f3a960-8522-475f-8465-c910fc6974b8/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 14:12:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:12:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 4479 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:12:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:12:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-19 14:12:25,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:12:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-19 14:12:28,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:12:28,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330904830] [2021-11-19 14:12:28,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330904830] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:12:28,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:12:28,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 16 [2021-11-19 14:12:28,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286817409] [2021-11-19 14:12:28,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:12:28,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:12:28,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:12:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:12:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:12:28,168 INFO L87 Difference]: Start difference. First operand 3044 states and 4247 transitions. Second operand has 13 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 6 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:12:34,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:12:37,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []